Question: how fetus develops week by week

Pregnancy Week By Week- Fetal Development Week 1 To 40 In Mother’s Womb | Gymbuddy Now Pregnancy Week By Week- Fetal Development Week 1 To 40 In Mother’s Womb
Pregnancy Week By Week- Fetal Development Week 1 To 40 In Mother’s Womb
1. Your baby is like a cluster of cells at the time of conception.
2. By the second month the fetus develops to a size of kidney bean, keeps moving and has webbed fingers.
3. By the time you are in your seventh month, your baby is 40 cm that is 15 inches and the baby can open and close eyes and can see around itself.
4. Watch the video to find week after week development of your baby in your womb
 Pregnancy Week By Week- Fetal Development Week 1 To 40 In Mother’s Womb | Gymbuddy Now
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Pregnancy Week By Week- Fetal Development Week 1 To 40 In Mother’s Womb
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Sandra
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August 24, 2017
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Pregnancy is that special moment in a woman’s life where in she literally takes a new birth. During the 9 months of pregnancy a woman’s body goes through several changes as the fetus grows week by week. When your baby gets formed in your womb, it is a cluster of cells which develop each week and then forms face, legs, arms, heartbeat. As the baby grows it starts kicking you. Scroll over as we bring a video that shows how your baby develops each week during pregnancy before your little wonder enters your world: 1. Your baby is like a cluster of cells at the time of conception. 2. By the second month the fetus develops to a size of kidney bean, keeps moving and has webbed fingers. 3.

Pregnancy Week By Week- Fetal Development Week 1 To 40 In Mother’s Womb | Gymbuddy Now

Pregnancy Week By Week- Fetal Development Week 1 To 40 In Mother’s Womb
Pregnancy Week By Week- Fetal Development Week 1 To 40 In Mother’s Womb
1. Your baby is like a cluster of cells at the time of conception.
2. By the second month the fetus develops to a size of kidney bean, keeps moving and has webbed fingers.
3. By the time you are in your seventh month, your baby is 40 cm that is 15 inches and the baby can open and close eyes and can see around itself.
4. Watch the video to find week after week development of your baby in your womb

Pregnancy Week By Week- Fetal Development Week 1 To 40 In Mother’s Womb | Gymbuddy Now
Hangout
Pregnancy Week By Week- Fetal Development Week 1 To 40 In Mother’s Womb
By
Sandra
-
August 24, 2017
0
3515
ad
Pregnancy is that special moment in a woman’s life where in she literally takes a new birth. During the 9 months of pregnancy a woman’s body goes through several changes as the fetus grows week by week. When your baby gets formed in your womb, it is a cluster of cells which develop each week and then forms face, legs, arms, heartbeat. As the baby grows it starts kicking you. Scroll over as we bring a video that shows how your baby develops each week during pregnancy before your little wonder enters your world: 1. Your baby is like a cluster of cells at the time of conception. 2. By the second month the fetus develops to a size of kidney bean, keeps moving and has webbed fingers. 3.

Movement, Position & Growth of Fetus Week By Week in Pregnancy Growth of Fetus Week By Week in Pregnancy
Growth of Fetus Week By Week in Pregnancy
Pregnancy And Baby Care Questions
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The fifth week of pregnancy is when your baby's heart, spinal cord, brain and other organs start to develop. By week six, your baby's heart will start to pump blood and the neural tube along his/her back starts to close. During the seventh week of pregnancy, your baby's face and brain begin to develop rapidly, along with his/her eye lenses and arms. By eight weeks, your baby's legs and arms and fingers will start to form. His/her upper lip and nose start to develop and your baby's ears, eyes and nipples will become visible. By the end of the first trimester, your baby's neck, head, eyelids and genitals will start to develop. By week thirteen, your baby will be discharging urine into the amniotic fluid and his/her intestines will have moved into the abdomen. In the next few weeks, your baby's scalp, hair and skeleton will begin to develop. His/her sex will become apparent during this period. In your eighteenth week of pregnancy, your baby may be able to hear things around him/her like the beating of your heart and the blood moving through the umbilical cord.

Movement, Position & Growth of Fetus Week By Week in Pregnancy

Growth of Fetus Week By Week in Pregnancy
Growth of Fetus Week By Week in Pregnancy
Pregnancy And Baby Care Questions
Continued...

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 The senses of taste and smell are starting to develop. The skin is beginning to thicken. The neck and lower limbs are becoming more defined. The fetus is now about the size of a nectarine. Week 15
The fetus can now roll and flip. That tiny heart pumps up to 100 pints of blood every day. Hair follicles have started to develop. The fetus is now about the size of a small grapefruit. Week 16
The digestive system starts working. The fetus can now hear some sounds, so keep talking and singing.

Fetal Development Week by Week | Pampers

Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester

The senses of taste and smell are starting to develop. The skin is beginning to thicken. The neck and lower limbs are becoming more defined. The fetus is now about the size of a nectarine. Week 15
The fetus can now roll and flip. That tiny heart pumps up to 100 pints of blood every day. Hair follicles have started to develop. The fetus is now about the size of a small grapefruit. Week 16
The digestive system starts working. The fetus can now hear some sounds, so keep talking and singing.

Movement, Position & Growth of Fetus Week By Week in Pregnancy Growth of Fetus Week By Week in Pregnancy
Growth of Fetus Week By Week in Pregnancy
Pregnancy And Baby Care Questions
Continued...
 By the end of the first trimester, your baby's neck, head, eyelids and genitals will start to develop. By week thirteen, your baby will be discharging urine into the amniotic fluid and his/her intestines will have moved into the abdomen. In the next few weeks, your baby's scalp, hair and skeleton will begin to develop. His/her sex will become apparent during this period. In your eighteenth week of pregnancy, your baby may be able to hear things around him/her like the beating of your heart and the blood moving through the umbilical cord. By the end of the second trimester, your baby's hands are fully developed and his/her immune system, liver and lungs start to mature. By week thirty, your baby's eyes are wide open and he/she has formed a considerable amount of hair. His/her bones are also completely developed by this time. In addition, your baby will gain weight rapidly in this trimester, by about week thirty six. By week forty, when your due date arrives, your baby's organs are ready to function on their own and he/she will descend into the head down position.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 That tiny heart pumps up to 100 pints of blood every day. Hair follicles have started to develop. The fetus is now about the size of a small grapefruit. Week 16
The digestive system starts working. The fetus can now hear some sounds, so keep talking and singing. Your little one could be the size of an apple. Week 17
The glands may start to produce vernix, a greasy substance that protects the skin in the womb. The eyes are now able to move slowly. Toenails are starting to grow. The fetus is now roughly the size of a pear.

That tiny heart pumps up to 100 pints of blood every day. Hair follicles have started to develop. The fetus is now about the size of a small grapefruit. Week 16
The digestive system starts working. The fetus can now hear some sounds, so keep talking and singing. Your little one could be the size of an apple. Week 17
The glands may start to produce vernix, a greasy substance that protects the skin in the womb. The eyes are now able to move slowly. Toenails are starting to grow. The fetus is now roughly the size of a pear.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 The embryo is about the size of a blueberry. Week 8
All major organs have formed and are growing — the building blocks are in place. Tubes connect the throat with the lungs to allow for future breathing. By the end of this week, your little one is no longer an embryo and is instead called a fetus, medically speaking, that is. The fetus is now about the size of a raspberry. Week 9
Little facial features form, including a more prominent nose. The head is large in proportion to the body, but your little one now has more of a mini-baby shape. The fetus is about the size of a cherry. Week 10
The head is rounding out. Eyelids and ears continue to develop — someone’s getting ready to see and hear you.

The embryo is about the size of a blueberry. Week 8
All major organs have formed and are growing — the building blocks are in place. Tubes connect the throat with the lungs to allow for future breathing. By the end of this week, your little one is no longer an embryo and is instead called a fetus, medically speaking, that is. The fetus is now about the size of a raspberry. Week 9
Little facial features form, including a more prominent nose. The head is large in proportion to the body, but your little one now has more of a mini-baby shape. The fetus is about the size of a cherry. Week 10
The head is rounding out. Eyelids and ears continue to develop — someone’s getting ready to see and hear you.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 Week 18
Fine hair known as lanugo begins to cover that little body. The fetus may wake from sleep in response to your movements. Your little one is about the size of a sweet potato. Week 19
Kicks and movements may be getting stronger. Ovaries have developed in girls and testes have formed in boys. The fetus may be able to (adorably) suck a thumb. Your little one is about the size of a mango. Week 20
Some facial features and external genitals may be visible via ultrasound. Your baby is producing meconium, which is the waste that will become his first poop after birth. His fingernails are growing.

Week 18
Fine hair known as lanugo begins to cover that little body. The fetus may wake from sleep in response to your movements. Your little one is about the size of a sweet potato. Week 19
Kicks and movements may be getting stronger. Ovaries have developed in girls and testes have formed in boys. The fetus may be able to (adorably) suck a thumb. Your little one is about the size of a mango. Week 20
Some facial features and external genitals may be visible via ultrasound. Your baby is producing meconium, which is the waste that will become his first poop after birth. His fingernails are growing.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 Your little one could be the size of an apple. Week 17
The glands may start to produce vernix, a greasy substance that protects the skin in the womb. The eyes are now able to move slowly. Toenails are starting to grow. The fetus is now roughly the size of a pear. Week 18
Fine hair known as lanugo begins to cover that little body. The fetus may wake from sleep in response to your movements. Your little one is about the size of a sweet potato. Week 19
Kicks and movements may be getting stronger. Ovaries have developed in girls and testes have formed in boys.

Your little one could be the size of an apple. Week 17
The glands may start to produce vernix, a greasy substance that protects the skin in the womb. The eyes are now able to move slowly. Toenails are starting to grow. The fetus is now roughly the size of a pear. Week 18
Fine hair known as lanugo begins to cover that little body. The fetus may wake from sleep in response to your movements. Your little one is about the size of a sweet potato. Week 19
Kicks and movements may be getting stronger. Ovaries have developed in girls and testes have formed in boys.

Movement, Position & Growth of Fetus Week By Week in Pregnancy Growth of Fetus Week By Week in Pregnancy
Growth of Fetus Week By Week in Pregnancy
Pregnancy And Baby Care Questions
Continued...
 By the fourth week, the zygote will attach itself to the uterine wall to nourish itself and your baby's placenta will begin to form. read more...
Pregnancy And Baby Care Questions
What Are Fetal Development Stages? How Does My Baby Develop? Does Smoking Affect Fetal Growth? Does Music Affect Fetal Development? Continued...
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The fifth week of pregnancy is when your baby's heart, spinal cord, brain and other organs start to develop. By week six, your baby's heart will start to pump blood and the neural tube along his/her back starts to close. During the seventh week of pregnancy, your baby's face and brain begin to develop rapidly, along with his/her eye lenses and arms. By eight weeks, your baby's legs and arms and fingers will start to form. His/her upper lip and nose start to develop and your baby's ears, eyes and nipples will become visible.

By the fourth week, the zygote will attach itself to the uterine wall to nourish itself and your baby's placenta will begin to form. read more...
Pregnancy And Baby Care Questions
What Are Fetal Development Stages? How Does My Baby Develop? Does Smoking Affect Fetal Growth? Does Music Affect Fetal Development? Continued...
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The fifth week of pregnancy is when your baby's heart, spinal cord, brain and other organs start to develop. By week six, your baby's heart will start to pump blood and the neural tube along his/her back starts to close. During the seventh week of pregnancy, your baby's face and brain begin to develop rapidly, along with his/her eye lenses and arms. By eight weeks, your baby's legs and arms and fingers will start to form. His/her upper lip and nose start to develop and your baby's ears, eyes and nipples will become visible.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 Brain development continues, and all five senses are working. Your baby is now about the size of a pineapple. Week 34
Your baby might shift to a head-down position as he prepares for birth. Fingernails continue to grow. Your baby continues to plump up, adding fat. He’s now about the size of a cantaloupe. Week 35
Fetal brain development continues; other parts of the nervous system and the lungs are also still developing. As your baby puts on fat, her skin becomes more pinkish, and less transparent. The musculoskeletal system has fully developed to enable movement after birth.

Brain development continues, and all five senses are working. Your baby is now about the size of a pineapple. Week 34
Your baby might shift to a head-down position as he prepares for birth. Fingernails continue to grow. Your baby continues to plump up, adding fat. He’s now about the size of a cantaloupe. Week 35
Fetal brain development continues; other parts of the nervous system and the lungs are also still developing. As your baby puts on fat, her skin becomes more pinkish, and less transparent. The musculoskeletal system has fully developed to enable movement after birth.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 The fetus is about the size of a Brussels sprout. Week 12
Your little one is moving, but you won’t feel it quite yet. Hands and arms are more developed than the lower limbs. Facial features are becoming more defined. Your little one might just be growing into your nose or your partner’s chin. If you have a Doppler exam this week, you might hear a heartbeat. The fetus is about as big as a passion fruit. Week 13
The sex hormones, testosterone and estrogen, are being produced. Your little one can now produce urine after swallowing amniotic fluid. All organs are fully formed and growing steadily.

The fetus is about the size of a Brussels sprout. Week 12
Your little one is moving, but you won’t feel it quite yet. Hands and arms are more developed than the lower limbs. Facial features are becoming more defined. Your little one might just be growing into your nose or your partner’s chin. If you have a Doppler exam this week, you might hear a heartbeat. The fetus is about as big as a passion fruit. Week 13
The sex hormones, testosterone and estrogen, are being produced. Your little one can now produce urine after swallowing amniotic fluid. All organs are fully formed and growing steadily.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 Your little one is about the size of a strawberry. Week 11
Muscle formation begins. The backbone is still soft and flexible, but other bones begin to harden. Red blood cell production begins in the liver. The head still makes up half of your baby’s body length. The fetus is about the size of a Brussels sprout. Week 12
Your little one is moving, but you won’t feel it quite yet. Hands and arms are more developed than the lower limbs. Facial features are becoming more defined. Your little one might just be growing into your nose or your partner’s chin.

Your little one is about the size of a strawberry. Week 11
Muscle formation begins. The backbone is still soft and flexible, but other bones begin to harden. Red blood cell production begins in the liver. The head still makes up half of your baby’s body length. The fetus is about the size of a Brussels sprout. Week 12
Your little one is moving, but you won’t feel it quite yet. Hands and arms are more developed than the lower limbs. Facial features are becoming more defined. Your little one might just be growing into your nose or your partner’s chin.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 Here's what's happening with your baby’s development this trimester. Week 28
His eyes can now open and close. Breathing is becoming more rhythmic. He may start to grow eyelashes this week. The average baby is the size of a head of lettuce. Week 29
Kicks and movements may be more noticeable. Download our fetal movement tracker to help make counting kicks easier. Your baby might be as big as a butternut squash. Week 30
Fine body hair called lanugo may begin to shed. Your baby may have hair on his head.

Here's what's happening with your baby’s development this trimester. Week 28
His eyes can now open and close. Breathing is becoming more rhythmic. He may start to grow eyelashes this week. The average baby is the size of a head of lettuce. Week 29
Kicks and movements may be more noticeable. Download our fetal movement tracker to help make counting kicks easier. Your baby might be as big as a butternut squash. Week 30
Fine body hair called lanugo may begin to shed. Your baby may have hair on his head.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 Week 4
The fertilized egg implants in the uterus and begins to develop into an embryo. The umbilical cord begins to form from the placenta. Your little one is about the size of a poppy seed. Week 5
Big steps are under way as the neural tube (which eventually forms the brain, backbone, and spinal cord) develops. The lungs and heart begin to form, and the heart may start to beat. You might get to hear it via ultrasound sometime between week 6 and 12. The amniotic sac has formed and is filling with amniotic fluid, which will help protect your baby throughout your pregnancy. This might be when you suspect you’re pregnant — time to take a home pregnancy test and schedule a visit with your healthcare provider. The embryo is about the size of an orange seed. Week 6
The embryo is now huddled up in a curved C-shape.

Week 4
The fertilized egg implants in the uterus and begins to develop into an embryo. The umbilical cord begins to form from the placenta. Your little one is about the size of a poppy seed. Week 5
Big steps are under way as the neural tube (which eventually forms the brain, backbone, and spinal cord) develops. The lungs and heart begin to form, and the heart may start to beat. You might get to hear it via ultrasound sometime between week 6 and 12. The amniotic sac has formed and is filling with amniotic fluid, which will help protect your baby throughout your pregnancy. This might be when you suspect you’re pregnant — time to take a home pregnancy test and schedule a visit with your healthcare provider. The embryo is about the size of an orange seed. Week 6
The embryo is now huddled up in a curved C-shape.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 The skin is thin and wrinkled, and blood vessels are visible. The average baby is as big as an ear of corn. Week 25
Your baby’s nervous system is developing quickly. She's gaining weight and adding fat, filling out those chubby cheeks you’ll soon get to squeeze. Your baby could be about the size of an acorn squash this week. Week 26
Your baby starts to produce melanin, the pigment that gives skin its color. Fetal lung development continues as the lungs start producing surfactant to help them inflate properly. Your little one is about the size of a zucchini. Week 27
Your little one can now make grasping motions. Hearing your voice is calming for her;

The skin is thin and wrinkled, and blood vessels are visible. The average baby is as big as an ear of corn. Week 25
Your baby’s nervous system is developing quickly. She's gaining weight and adding fat, filling out those chubby cheeks you’ll soon get to squeeze. Your baby could be about the size of an acorn squash this week. Week 26
Your baby starts to produce melanin, the pigment that gives skin its color. Fetal lung development continues as the lungs start producing surfactant to help them inflate properly. Your little one is about the size of a zucchini. Week 27
Your little one can now make grasping motions. Hearing your voice is calming for her;

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 Week 23
Your baby might now respond to the sound of your voice by moving. She spends much of her time in the rapid eye movement (REM) phase of sleep. Your baby is approximately the size of an eggplant. Week 24
Fetal lung development is under way. The lungs have formed but are not functional just yet. The skin is thin and wrinkled, and blood vessels are visible. The average baby is as big as an ear of corn. Week 25
Your baby’s nervous system is developing quickly. She's gaining weight and adding fat, filling out those chubby cheeks you’ll soon get to squeeze. Your baby could be about the size of an acorn squash this week.

Week 23
Your baby might now respond to the sound of your voice by moving. She spends much of her time in the rapid eye movement (REM) phase of sleep. Your baby is approximately the size of an eggplant. Week 24
Fetal lung development is under way. The lungs have formed but are not functional just yet. The skin is thin and wrinkled, and blood vessels are visible. The average baby is as big as an ear of corn. Week 25
Your baby’s nervous system is developing quickly. She's gaining weight and adding fat, filling out those chubby cheeks you’ll soon get to squeeze. Your baby could be about the size of an acorn squash this week.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 You might get to hear it via ultrasound sometime between week 6 and 12. The amniotic sac has formed and is filling with amniotic fluid, which will help protect your baby throughout your pregnancy. This might be when you suspect you’re pregnant — time to take a home pregnancy test and schedule a visit with your healthcare provider. The embryo is about the size of an orange seed. Week 6
The embryo is now huddled up in a curved C-shape. Little buds are appearing that will become arms and legs. The embryo is about the size of a pomegranate seed. Week 7
The brain and face are growing. Eyelids and bones start to form. Nostrils and retinas begin to develop.

You might get to hear it via ultrasound sometime between week 6 and 12. The amniotic sac has formed and is filling with amniotic fluid, which will help protect your baby throughout your pregnancy. This might be when you suspect you’re pregnant — time to take a home pregnancy test and schedule a visit with your healthcare provider. The embryo is about the size of an orange seed. Week 6
The embryo is now huddled up in a curved C-shape. Little buds are appearing that will become arms and legs. The embryo is about the size of a pomegranate seed. Week 7
The brain and face are growing. Eyelids and bones start to form. Nostrils and retinas begin to develop.

Fetal Development Week by Week | Pampers Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester
 He’s now about the size of a cantaloupe. Week 35
Fetal brain development continues; other parts of the nervous system and the lungs are also still developing. As your baby puts on fat, her skin becomes more pinkish, and less transparent. The musculoskeletal system has fully developed to enable movement after birth. Your baby could be as big as a honeydew melon. Week 36
He’s taking up more space in the amniotic sac. Fetal kicks, rolls, and other movements continue. Your little one is about the size of a head of romaine lettuce. Week 37
Your baby is still growing and is considere

He’s now about the size of a cantaloupe. Week 35
Fetal brain development continues; other parts of the nervous system and the lungs are also still developing. As your baby puts on fat, her skin becomes more pinkish, and less transparent. The musculoskeletal system has fully developed to enable movement after birth. Your baby could be as big as a honeydew melon. Week 36
He’s taking up more space in the amniotic sac. Fetal kicks, rolls, and other movements continue. Your little one is about the size of a head of romaine lettuce. Week 37
Your baby is still growing and is considere

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
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 https://www.acog.org/patient-resources/faqs/pregnancy/how-your-fetus-grows-during-pregnancy. Accessed Feb. 25, 2020. American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth Month to Month. 6th ed. American College of Obstetricians and Gynecologists; 2015. Moore KL, et al. The Developing Human: Clinically Oriented Embryology.

Fetal development: The 1st trimester - Mayo Clinic

Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
Products and Services

https://www.acog.org/patient-resources/faqs/pregnancy/how-your-fetus-grows-during-pregnancy. Accessed Feb. 25, 2020. American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth Month to Month. 6th ed. American College of Obstetricians and Gynecologists; 2015. Moore KL, et al. The Developing Human: Clinically Oriented Embryology.

Movement, Position & Growth of Fetus Week By Week in Pregnancy Growth of Fetus Week By Week in Pregnancy
Growth of Fetus Week By Week in Pregnancy
Pregnancy And Baby Care Questions
Continued...
 By the end of the second trimester, your baby's hands are fully developed and his/her immune system, liver and lungs start to mature. By week thirty, your baby's eyes are wide open and he/she has formed a considerable amount of hair. His/her bones are also completely developed by this time. In addition, your baby will gain weight rapidly in this trimester, by about week thirty six. By week forty, when your due date arrives, your baby's organs are ready to function on their own and he/she will descend into the head down position. Read more articles from the During Pregnancy Category.

By the end of the second trimester, your baby's hands are fully developed and his/her immune system, liver and lungs start to mature. By week thirty, your baby's eyes are wide open and he/she has formed a considerable amount of hair. His/her bones are also completely developed by this time. In addition, your baby will gain weight rapidly in this trimester, by about week thirty six. By week forty, when your due date arrives, your baby's organs are ready to function on their own and he/she will descend into the head down position. Read more articles from the During Pregnancy Category.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 The fetus's brain, spinal cord, heart, and digestive tract begin to form. Week Four: Rudimentary blood vessels begin to form, and the heart begins to beat. Week Five: The circulatory system further develops and becomes functional. The digestive and respiratory systems, arm and leg buds, and eye and ear structures begin to form. Week Six: The fetus is about an eighth-of-an-inch long. Organs and facial features become more well defined. The neural tube closes, which will later differentiate the brain, spinal cord, and nerves.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth

Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic

The fetus's brain, spinal cord, heart, and digestive tract begin to form. Week Four: Rudimentary blood vessels begin to form, and the heart begins to beat. Week Five: The circulatory system further develops and becomes functional. The digestive and respiratory systems, arm and leg buds, and eye and ear structures begin to form. Week Six: The fetus is about an eighth-of-an-inch long. Organs and facial features become more well defined. The neural tube closes, which will later differentiate the brain, spinal cord, and nerves.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 Changes to a woman's body, and development of the fetus, are considerable during this time. Second Trimester Fetal Development
Weeks 13: The fetus has fully functioning nerves, organs, and muscles, and it flexes and kicks considerably. Week 14: The fetus's hormone production increases and sex organs develop. Week 15: Skin begins to form. Bone and marrow that will comprise the skeleton continue to form. Week 16: Fetuses are able to make facial expressions, hiccup, and make a fist.

Changes to a woman's body, and development of the fetus, are considerable during this time. Second Trimester Fetal Development
Weeks 13: The fetus has fully functioning nerves, organs, and muscles, and it flexes and kicks considerably. Week 14: The fetus's hormone production increases and sex organs develop. Week 15: Skin begins to form. Bone and marrow that will comprise the skeleton continue to form. Week 16: Fetuses are able to make facial expressions, hiccup, and make a fist.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
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 The fetus is now able to sense taste and touch. For male fetuses, the testes descend into the abdomen. Week 23: The fetus begins to practice breathing by drawing amniotic fluid into and out of the lungs. The skin continues to mature and fat deposits increase. Week 24: The fetus's fully developed inner ear gives the fetus a sense of balance, and it may adopt a regular sleeping position. Week 25: The fetus's sensory system becomes more refined. Week 26:

The fetus is now able to sense taste and touch. For male fetuses, the testes descend into the abdomen. Week 23: The fetus begins to practice breathing by drawing amniotic fluid into and out of the lungs. The skin continues to mature and fat deposits increase. Week 24: The fetus's fully developed inner ear gives the fetus a sense of balance, and it may adopt a regular sleeping position. Week 25: The fetus's sensory system becomes more refined. Week 26:

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
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 As the due date approaches, fetal development involves finishing touches that allow the fetus to survive outside the womb. Third Trimester Fetal Development
Week 28: The fetus's eyes open, and the eye color is established. The fetus may sleep for about 30 minutes at a time. Week 29: As the fetus begins to store iron, calcium, and phosphorus, its bones grow stronger and its movements become more vigorous. Week 30: From weeks 30 to 37, the fetus gains about a half a pound each week. The fetus practices breathing by moving the diaphragm. Week 31:

As the due date approaches, fetal development involves finishing touches that allow the fetus to survive outside the womb. Third Trimester Fetal Development
Week 28: The fetus's eyes open, and the eye color is established. The fetus may sleep for about 30 minutes at a time. Week 29: As the fetus begins to store iron, calcium, and phosphorus, its bones grow stronger and its movements become more vigorous. Week 30: From weeks 30 to 37, the fetus gains about a half a pound each week. The fetus practices breathing by moving the diaphragm. Week 31:

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 The fetus weighs a little over half a pound and is about six inches long. Week 21: During this week, the bone marrow takes over red blood cell production from the liver and spleen. The fetus begins swallowing small amounts of sugar in the amniotic fluid. Week 22: The fetus is now able to sense taste and touch. For male fetuses, the testes descend into the abdomen. Week 23: The fetus begins to practice breathing by drawing amniotic fluid into and out of the lungs. The skin continues to mature and fat deposits increase.

The fetus weighs a little over half a pound and is about six inches long. Week 21: During this week, the bone marrow takes over red blood cell production from the liver and spleen. The fetus begins swallowing small amounts of sugar in the amniotic fluid. Week 22: The fetus is now able to sense taste and touch. For male fetuses, the testes descend into the abdomen. Week 23: The fetus begins to practice breathing by drawing amniotic fluid into and out of the lungs. The skin continues to mature and fat deposits increase.

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
Products and Services
 Frequently asked questions: Pregnancy FAQ156: Prenatal development: How your fetus grows during pregnancy. American College of Obstetricians and Gynecologists. https://www.acog.org/patient-resources/faqs/pregnancy/how-your-fetus-grows-during-pregnancy. Accessed Feb. 25, 2020. American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth Month to Month. 6th ed.

Frequently asked questions: Pregnancy FAQ156: Prenatal development: How your fetus grows during pregnancy. American College of Obstetricians and Gynecologists. https://www.acog.org/patient-resources/faqs/pregnancy/how-your-fetus-grows-during-pregnancy. Accessed Feb. 25, 2020. American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth Month to Month. 6th ed.

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
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 June 30, 2020
Show references
Pregnancy: Stages of pregnancy. Office on Women's Health. https://www.womenshealth.gov/pregnancy/youre-pregnant-now-what/stages-pregnancy. Accessed Feb. 25, 2020. Frequently asked questions: Pregnancy FAQ156: Prenatal development: How your fetus grows during pregnancy. American College of Obstetricians and Gynecologists.

June 30, 2020
Show references
Pregnancy: Stages of pregnancy. Office on Women's Health. https://www.womenshealth.gov/pregnancy/youre-pregnant-now-what/stages-pregnancy. Accessed Feb. 25, 2020. Frequently asked questions: Pregnancy FAQ156: Prenatal development: How your fetus grows during pregnancy. American College of Obstetricians and Gynecologists.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 The cell group implants onto the uterine wall around day six, at which point it is referred to as an embryo. Implantation signals the beginning of pregnancy. Week Two: During week two, the cells of the implanted embryo multiply and differentiate. Week Three: The fetus's brain, spinal cord, heart, and digestive tract begin to form. Week Four: Rudimentary blood vessels begin to form, and the heart begins to beat. Week Five: The circulatory system further develops and becomes functional.

The cell group implants onto the uterine wall around day six, at which point it is referred to as an embryo. Implantation signals the beginning of pregnancy. Week Two: During week two, the cells of the implanted embryo multiply and differentiate. Week Three: The fetus's brain, spinal cord, heart, and digestive tract begin to form. Week Four: Rudimentary blood vessels begin to form, and the heart begins to beat. Week Five: The circulatory system further develops and becomes functional.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 As the fetus begins to store iron, calcium, and phosphorus, its bones grow stronger and its movements become more vigorous. Week 30: From weeks 30 to 37, the fetus gains about a half a pound each week. The fetus practices breathing by moving the diaphragm. Week 31: Male fetuses' testicles drop into the scrotum (female fetuses' clitoris is relatively prominent). Week 32: Lanugo begins to fall off the skin. Due to the cramped quarters in the uterus, fetal movements may become less forceful. Contact your healthcare provider if movements decrease.

As the fetus begins to store iron, calcium, and phosphorus, its bones grow stronger and its movements become more vigorous. Week 30: From weeks 30 to 37, the fetus gains about a half a pound each week. The fetus practices breathing by moving the diaphragm. Week 31: Male fetuses' testicles drop into the scrotum (female fetuses' clitoris is relatively prominent). Week 32: Lanugo begins to fall off the skin. Due to the cramped quarters in the uterus, fetal movements may become less forceful. Contact your healthcare provider if movements decrease.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 Weeks 35: The fetus continues to gain weight and to store fat. Its movements may be restricted to stretches, rolls, and wiggles. Week 36: The fetus has its first bowel movement. Week 37: As fat accumulates, the fetus's body becomes rounder. The fetus is considered full-term at the end of this week. Week 38: The fetus's brain and nervous system are working more and more precisely, and will continue to improve after birth.

Weeks 35: The fetus continues to gain weight and to store fat. Its movements may be restricted to stretches, rolls, and wiggles. Week 36: The fetus has its first bowel movement. Week 37: As fat accumulates, the fetus's body becomes rounder. The fetus is considered full-term at the end of this week. Week 38: The fetus's brain and nervous system are working more and more precisely, and will continue to improve after birth.

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
Products and Services
 Congratulations! You'll undoubtedly spend the months ahead wondering how your baby is growing and developing. What does your baby look like? How big is he or she? When will you feel the first kick? Fetal development typically follows a predictable course. Find out what happens during the first trimester by checking out this weekly calendar of events. Keep in mind that measurements are approximate. Weeks 1 and 2: Getting ready
It might seem strange, but you're not actually pregnant the first week or two of the time allotted to your pregnancy.

Congratulations! You'll undoubtedly spend the months ahead wondering how your baby is growing and developing. What does your baby look like? How big is he or she? When will you feel the first kick? Fetal development typically follows a predictable course. Find out what happens during the first trimester by checking out this weekly calendar of events. Keep in mind that measurements are approximate. Weeks 1 and 2: Getting ready
It might seem strange, but you're not actually pregnant the first week or two of the time allotted to your pregnancy.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 Week 33: The fetus can detect light, and its lungs are almost fully developed. Week 34: The vernix covering the skin becomes thicker to protect the fetus's skin during birth. The fetus weighs about four or five pounds. Weeks 35: The fetus continues to gain weight and to store fat. Its movements may be restricted to stretches, rolls, and wiggles. Week 36: The fetus has its first bowel movement.

Week 33: The fetus can detect light, and its lungs are almost fully developed. Week 34: The vernix covering the skin becomes thicker to protect the fetus's skin during birth. The fetus weighs about four or five pounds. Weeks 35: The fetus continues to gain weight and to store fat. Its movements may be restricted to stretches, rolls, and wiggles. Week 36: The fetus has its first bowel movement.

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
Products and Services
 Fetal development typically follows a predictable course. Find out what happens during the first trimester by checking out this weekly calendar of events. Keep in mind that measurements are approximate. Weeks 1 and 2: Getting ready
It might seem strange, but you're not actually pregnant the first week or two of the time allotted to your pregnancy. Yes, you read that correctly! Conception typically occurs about two weeks after your last period begins. To calculate your estimated due date, your health care provider will count ahead 40 weeks from the start of your last period. This means your period is counted as part of your pregnancy — even though you weren't pregnant at the time. Week 3:

Fetal development typically follows a predictable course. Find out what happens during the first trimester by checking out this weekly calendar of events. Keep in mind that measurements are approximate. Weeks 1 and 2: Getting ready
It might seem strange, but you're not actually pregnant the first week or two of the time allotted to your pregnancy. Yes, you read that correctly! Conception typically occurs about two weeks after your last period begins. To calculate your estimated due date, your health care provider will count ahead 40 weeks from the start of your last period. This means your period is counted as part of your pregnancy — even though you weren't pregnant at the time. Week 3:

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
Products and Services
 Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Fetal development begins soon after conception. Find out how your baby grows and develops during the first trimester. By Mayo Clinic Staff
You're pregnant. Congratulations! You'll undoubtedly spend the months ahead wondering how your baby is growing and developing. What does your baby look like? How big is he or she? When will you feel the first kick?

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Fetal development begins soon after conception. Find out how your baby grows and develops during the first trimester. By Mayo Clinic Staff
You're pregnant. Congratulations! You'll undoubtedly spend the months ahead wondering how your baby is growing and developing. What does your baby look like? How big is he or she? When will you feel the first kick?

Brain development in fetus | General center | SteadyHealth.com Brain development in fetus
Brain development in fetus
Fetal brain development
Fetal brain development timeline
Sources & Links
 In the eleventh week, the spinal cord is defined, while vocal cords and taste buds are formed in the twelfth week. The week thirteen is characterized by the complete forming of the heart, the spleen and the liver, while the fetus begins to use placenta to take nourishment from the mother in the fourteenth week. The hair grows on the skin in the fifteenth week, while in the sixteenth week the mother can feel the kicking of the baby. Throughout the seventeenth, eighteenth and nineteenth week of the pregnancy, the fetus develops the brain very rapidly and the brain is now divided into the left and right brain hemispheres. From the twentieth to the twenty-second week the brain furthers develop and now it is possible to recognize different sounds. In the twenty-third week, the nerve cells join and form the nervous system, and starting from this week, the brain begins to control the other body functions. In the twenty-seventh week, the fetus may even be dreaming and with the twenty-eighth week, the second trimester of the pregnancy is finished, with the brain completely formed. From the twenty-ninth to fortieth week, which is the third trimester of pregnancy, the brain only grows in size and there are only few brain developments. Sources & Links
Important notification about information and brand names
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Brain development in fetus | General center | SteadyHealth.com

Brain development in fetus
Brain development in fetus
Fetal brain development
Fetal brain development timeline
Sources & Links

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 Week 15: Skin begins to form. Bone and marrow that will comprise the skeleton continue to form. Week 16: Fetuses are able to make facial expressions, hiccup, and make a fist. Female fetuses are forming millions of eggs in the ovaries. Week 17: Fat stores that will protect the organs after birth begin to develop under the skin. Week 18: The fetus is able to hear and swallow.

Week 15: Skin begins to form. Bone and marrow that will comprise the skeleton continue to form. Week 16: Fetuses are able to make facial expressions, hiccup, and make a fist. Female fetuses are forming millions of eggs in the ovaries. Week 17: Fat stores that will protect the organs after birth begin to develop under the skin. Week 18: The fetus is able to hear and swallow.

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
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 By the 10th week of pregnancy, or eight weeks after conception, your baby's head has become more round. Your baby can now bend his or her elbows. Toes and fingers lose their webbing and become longer. The eyelids and external ears continue to develop. The umbilical cord is clearly visible. Week 11: Baby's genitals develop
At the beginning of the 11th week of pregnancy, or the ninth week after conception, your baby's head still makes up about half of its length. However, your baby's body is about to catch up. Your baby is now officially described as a fetus. This week your baby's face is broad, the eyes widely separated, the eyelids fused and the ears low set.

By the 10th week of pregnancy, or eight weeks after conception, your baby's head has become more round. Your baby can now bend his or her elbows. Toes and fingers lose their webbing and become longer. The eyelids and external ears continue to develop. The umbilical cord is clearly visible. Week 11: Baby's genitals develop
At the beginning of the 11th week of pregnancy, or the ninth week after conception, your baby's head still makes up about half of its length. However, your baby's body is about to catch up. Your baby is now officially described as a fetus. This week your baby's face is broad, the eyes widely separated, the eyelids fused and the ears low set.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 During the ninth week, the fetus may begin moving. Hair follicles and reproductive organs begin to form. Week Ten: All the vital organs, fingers, and toes are in place. The skeleton begins to form, and male fetuses begin producing testosterone. Week Eleven: The fetus begins to grow more rapidly, nourished by the growing placenta. Genitalia become discernable by the end of this week. Week Twelve: Week twelve marks the end of the first trimester.

During the ninth week, the fetus may begin moving. Hair follicles and reproductive organs begin to form. Week Ten: All the vital organs, fingers, and toes are in place. The skeleton begins to form, and male fetuses begin producing testosterone. Week Eleven: The fetus begins to grow more rapidly, nourished by the growing placenta. Genitalia become discernable by the end of this week. Week Twelve: Week twelve marks the end of the first trimester.

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
Products and Services
 American College of Obstetricians and Gynecologists; 2015. Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020.

American College of Obstetricians and Gynecologists; 2015. Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 Week Seven: The fetus's limbs and eyes and ear buds, and the umbilical cord linking the fetus to the placenta, are visible. Week Eight: The fetus forms fingers and toes, and the facial features become more distinct. Week Nine: During the ninth week, the fetus may begin moving. Hair follicles and reproductive organs begin to form. Week Ten: All the vital organs, fingers, and toes are in place. The skeleton begins to form, and male fetuses begin producing testosterone.

Week Seven: The fetus's limbs and eyes and ear buds, and the umbilical cord linking the fetus to the placenta, are visible. Week Eight: The fetus forms fingers and toes, and the facial features become more distinct. Week Nine: During the ninth week, the fetus may begin moving. Hair follicles and reproductive organs begin to form. Week Ten: All the vital organs, fingers, and toes are in place. The skeleton begins to form, and male fetuses begin producing testosterone.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 Male fetuses' testicles drop into the scrotum (female fetuses' clitoris is relatively prominent). Week 32: Lanugo begins to fall off the skin. Due to the cramped quarters in the uterus, fetal movements may become less forceful. Contact your healthcare provider if movements decrease. Week 33: The fetus can detect light, and its lungs are almost fully developed. Week 34: The vernix covering the skin becomes thicker to protect the fetus's skin during birth. The fetus weighs about four or five pounds.

Male fetuses' testicles drop into the scrotum (female fetuses' clitoris is relatively prominent). Week 32: Lanugo begins to fall off the skin. Due to the cramped quarters in the uterus, fetal movements may become less forceful. Contact your healthcare provider if movements decrease. Week 33: The fetus can detect light, and its lungs are almost fully developed. Week 34: The vernix covering the skin becomes thicker to protect the fetus's skin during birth. The fetus weighs about four or five pounds.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
Find a Fertility Clinic
 The digestive and respiratory systems, arm and leg buds, and eye and ear structures begin to form. Week Six: The fetus is about an eighth-of-an-inch long. Organs and facial features become more well defined. The neural tube closes, which will later differentiate the brain, spinal cord, and nerves. Week Seven: The fetus's limbs and eyes and ear buds, and the umbilical cord linking the fetus to the placenta, are visible. Week Eight: The fetus forms fingers and toes, and the facial features become more distinct. Week Nine:

The digestive and respiratory systems, arm and leg buds, and eye and ear structures begin to form. Week Six: The fetus is about an eighth-of-an-inch long. Organs and facial features become more well defined. The neural tube closes, which will later differentiate the brain, spinal cord, and nerves. Week Seven: The fetus's limbs and eyes and ear buds, and the umbilical cord linking the fetus to the placenta, are visible. Week Eight: The fetus forms fingers and toes, and the facial features become more distinct. Week Nine:

Week 5 of Pregnancy: Pregnancy Week by Week Week 5 of Pregnancy: Pregnancy Week by Week
Week 5 of Pregnancy: Pregnancy Week by Week
The Growth and Development of Fetus at Week 5 of Pregnancy
Ultrasound imaging at week 5 of pregnancy
Sign and symptoms of week 5 of pregnancy
Some dos and don’ts to remember in week 5 of pregnancy
Healthy eating habits to follow
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 At this week, the fetus is still as small as a sesame seed. It looks more like a small tadpole than a human. The fetus may measure about 2 mm or 0.13 inches from the crown to the rump. The fetus, at this stage, is made of three layers: the endoderm, ectoderm, and mesoderm. These layers later develop and form the organs and tissues of the body. Major developments occur in the nervous system of the baby. The neural tube begins to develop. The brain, nerves, spinal cord, and the backbone develop from the neural tube. It grows from the top layer, the ectoderm.

Week 5 of Pregnancy: Pregnancy Week by Week

Week 5 of Pregnancy: Pregnancy Week by Week
Week 5 of Pregnancy: Pregnancy Week by Week
The Growth and Development of Fetus at Week 5 of Pregnancy
Ultrasound imaging at week 5 of pregnancy
Sign and symptoms of week 5 of pregnancy
Some dos and don’ts to remember in week 5 of pregnancy
Healthy eating habits to follow
RELATED POSTS

At this week, the fetus is still as small as a sesame seed. It looks more like a small tadpole than a human. The fetus may measure about 2 mm or 0.13 inches from the crown to the rump. The fetus, at this stage, is made of three layers: the endoderm, ectoderm, and mesoderm. These layers later develop and form the organs and tissues of the body. Major developments occur in the nervous system of the baby. The neural tube begins to develop. The brain, nerves, spinal cord, and the backbone develop from the neural tube. It grows from the top layer, the ectoderm.

Fetal development: The 3rd trimester - Mayo Clinic
Fetal development: The 3rd trimester
Week 28: Baby's eyes partially open
Week 29: Baby kicks and stretches
Week 30: Baby's hair grows
Week 31: Baby's rapid weight gain begins
Week 32: Baby practices breathing
Week 33: Baby detects light
Week 34: Baby's fingernails grow
Week 35: Baby's skin is smooth
Week 36: Baby takes up most of the amniotic sac
Week 37: Baby might turn head down
Week 38: Baby's toenails grow
Week 39: Baby's chest is prominent
Week 40: Your due date arrives
Products and Services
 Fetal development: The 3rd trimester - Mayo Clinic
Fetal development: The 3rd trimester
Fetal development continues during the third trimester. Your baby will open his or her eyes, gain more weight, and prepare for delivery. By Mayo Clinic Staff
The end of your pregnancy is near! By now, you're eager to meet your baby face to face. Your uterus, however, is still a busy place. Here's a weekly calendar of events for fetal development during the third trimester. Keep in mind that measurements are approximate. Week 28:

Fetal development: The 3rd trimester - Mayo Clinic

Fetal development: The 3rd trimester
Week 28: Baby's eyes partially open
Week 29: Baby kicks and stretches
Week 30: Baby's hair grows
Week 31: Baby's rapid weight gain begins
Week 32: Baby practices breathing
Week 33: Baby detects light
Week 34: Baby's fingernails grow
Week 35: Baby's skin is smooth
Week 36: Baby takes up most of the amniotic sac
Week 37: Baby might turn head down
Week 38: Baby's toenails grow
Week 39: Baby's chest is prominent
Week 40: Your due date arrives
Products and Services

Fetal development: The 3rd trimester - Mayo Clinic
Fetal development: The 3rd trimester
Fetal development continues during the third trimester. Your baby will open his or her eyes, gain more weight, and prepare for delivery. By Mayo Clinic Staff
The end of your pregnancy is near! By now, you're eager to meet your baby face to face. Your uterus, however, is still a busy place. Here's a weekly calendar of events for fetal development during the third trimester. Keep in mind that measurements are approximate. Week 28:

Brain development in fetus | General center | SteadyHealth.com Brain development in fetus
Brain development in fetus
Fetal brain development
Fetal brain development timeline
Sources & Links
 In this period the neural tube, which links the spinal cord and the brain, is also formed. Until the end of the seventh week of the pregnancy, the brain formation is almost completely finished. The eighth week of the pregnancy is characteristic for the big head, as well as for the hindbrain development, which controls the heart rate and breathing. While in the ninth week, the nervous system is almost completed for its proper functioning, and in the tenth week, the fetus develops the genitals so that the sex of the baby can be seen through the ultrasound. In the tenth week, the brain starts to form even 250 000 neurons in a minute. In the eleventh week, the spinal cord is defined, while vocal cords and taste buds are formed in the twelfth week. The week thirteen is characterized by the complete forming of the heart, the spleen and the liver, while the fetus begins to use placenta to take nourishment from the mother in the fourteenth week. The hair grows on the skin in the fifteenth week, while in the sixteenth week the mother can feel the kicking of the baby. Throughout the seventeenth, eighteenth and nineteenth week of the pregnancy, the fetus develops the brain very rapidly and the brain is now divided into the left and right brain hemispheres. From the twentieth to the twenty-second week the brain furthers develop and now it is possible to recognize different sounds.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
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 Female fetuses are forming millions of eggs in the ovaries. Week 17: Fat stores that will protect the organs after birth begin to develop under the skin. Week 18: The fetus is able to hear and swallow. Week 19: The fetus can now make reflexive muscle movements. A fine layer of hair called lanugo, and a pasty white coating called vernix, cover the skin. Week 20: The skin thickens, and the limbs are well-developed.

Female fetuses are forming millions of eggs in the ovaries. Week 17: Fat stores that will protect the organs after birth begin to develop under the skin. Week 18: The fetus is able to hear and swallow. Week 19: The fetus can now make reflexive muscle movements. A fine layer of hair called lanugo, and a pasty white coating called vernix, cover the skin. Week 20: The skin thickens, and the limbs are well-developed.

First Trimester Fetal development information How your baby is developing growing inside you in months one two three month 1, 2 or 3 First Trimester:
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First Trimester:
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 The developing embryo is only one-hundredth of an inch long, but is rapidly developing. It can reproduce itself through twinning at any time up to about 14 days after conception; this is how identical twins are formed. 4 weeks - At week four, you might begin to suspect you are pregnant since the embryo produces hormones which stop the mother's menstrual cycle. The cluster of cells has attached to the uterus wall and has divided into two parts. The half attached to the uterine wall will become the placenta, the vessel filled support system that will nourish the developing life, and the other half will become the baby. The amniotic fluid that cushions the fetus begins to form. The cells of the embryo multiply and begin to take on specific functions. The backbone, spinal column, and nervous system are forming. The heart, kidneys, liver, and intestines will soon be taking shape.

First Trimester Fetal development information How your baby is developing growing inside you in months one two three month 1, 2 or 3

First Trimester:
Weeks, Months and Trimesters Guides
First Trimester:
Week By Week Pregnancy Calendar

The developing embryo is only one-hundredth of an inch long, but is rapidly developing. It can reproduce itself through twinning at any time up to about 14 days after conception; this is how identical twins are formed. 4 weeks - At week four, you might begin to suspect you are pregnant since the embryo produces hormones which stop the mother's menstrual cycle. The cluster of cells has attached to the uterus wall and has divided into two parts. The half attached to the uterine wall will become the placenta, the vessel filled support system that will nourish the developing life, and the other half will become the baby. The amniotic fluid that cushions the fetus begins to form. The cells of the embryo multiply and begin to take on specific functions. The backbone, spinal column, and nervous system are forming. The heart, kidneys, liver, and intestines will soon be taking shape.

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
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 The heart and other organs also are starting to form and the heart begins to beat. Structures necessary to the formation of the eyes and ears develop. Small buds appear that will soon become arms. Your baby's body begins to take on a C-shaped curvature. Week 7: Baby's head develops
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Fetal development five weeks after conception
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Fetal development five weeks after conception
Fetal development five weeks after conception
By the end of the seventh week of pregnancy — five weeks after conception — your baby's brain and face are the focus of development. Seven weeks into your pregnancy, or five weeks after conception, your baby's brain and face are growing. Depressions that will give rise to nostrils become visible, and the beginnings of the retinas form. Lower limb buds that will become legs appear and the arm buds that sprouted last week now take on the shape of paddles. Week 8:

The heart and other organs also are starting to form and the heart begins to beat. Structures necessary to the formation of the eyes and ears develop. Small buds appear that will soon become arms. Your baby's body begins to take on a C-shaped curvature. Week 7: Baby's head develops
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Fetal development five weeks after conception
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Fetal development five weeks after conception
Fetal development five weeks after conception
By the end of the seventh week of pregnancy — five weeks after conception — your baby's brain and face are the focus of development. Seven weeks into your pregnancy, or five weeks after conception, your baby's brain and face are growing. Depressions that will give rise to nostrils become visible, and the beginnings of the retinas form. Lower limb buds that will become legs appear and the arm buds that sprouted last week now take on the shape of paddles. Week 8:

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
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 Week 19: The fetus can now make reflexive muscle movements. A fine layer of hair called lanugo, and a pasty white coating called vernix, cover the skin. Week 20: The skin thickens, and the limbs are well-developed. The fetus weighs a little over half a pound and is about six inches long. Week 21: During this week, the bone marrow takes over red blood cell production from the liver and spleen. The fetus begins swallowing small amounts of sugar in the amniotic fluid. Week 22:

Week 19: The fetus can now make reflexive muscle movements. A fine layer of hair called lanugo, and a pasty white coating called vernix, cover the skin. Week 20: The skin thickens, and the limbs are well-developed. The fetus weighs a little over half a pound and is about six inches long. Week 21: During this week, the bone marrow takes over red blood cell production from the liver and spleen. The fetus begins swallowing small amounts of sugar in the amniotic fluid. Week 22:

Week 5 of Pregnancy: Pregnancy Week by Week Week 5 of Pregnancy: Pregnancy Week by Week
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 The urine pregnancy test can help to confirm the news. Here is a brief discussion about what you can expect the growth and development of the fetus at week 5 of pregnancy. The Growth and Development of Fetus at Week 5 of Pregnancy
The growth of the baby takes up speed following the 5 th week. The embryo attaches itself to the uterine ling. It begins growing at a faster pace. At this week, the fetus is still as small as a sesame seed. It looks more like a small tadpole than a human. The fetus may measure about 2 mm or 0.13 inches from the crown to the rump. The fetus, at this stage, is made of three layers: the endoderm, ectoderm, and mesoderm.

The urine pregnancy test can help to confirm the news. Here is a brief discussion about what you can expect the growth and development of the fetus at week 5 of pregnancy. The Growth and Development of Fetus at Week 5 of Pregnancy
The growth of the baby takes up speed following the 5 th week. The embryo attaches itself to the uterine ling. It begins growing at a faster pace. At this week, the fetus is still as small as a sesame seed. It looks more like a small tadpole than a human. The fetus may measure about 2 mm or 0.13 inches from the crown to the rump. The fetus, at this stage, is made of three layers: the endoderm, ectoderm, and mesoderm.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
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 Week 24: The fetus's fully developed inner ear gives the fetus a sense of balance, and it may adopt a regular sleeping position. Week 25: The fetus's sensory system becomes more refined. Week 26: The eyes are fully developed, although the lids remain closed. Week 27: The lungs, liver, and immune system continue to develop, and the fetus weighs about two pounds. With intensive medical attention, a fetus born at 27 weeks has about an 85 percent chance of survival. Trimester Three - Weeks 28 through 40
At the beginning of the third trimester, pregnancy becomes a bit more uncomfortable for a woman, while anticipation of the birth increases.

Week 24: The fetus's fully developed inner ear gives the fetus a sense of balance, and it may adopt a regular sleeping position. Week 25: The fetus's sensory system becomes more refined. Week 26: The eyes are fully developed, although the lids remain closed. Week 27: The lungs, liver, and immune system continue to develop, and the fetus weighs about two pounds. With intensive medical attention, a fetus born at 27 weeks has about an 85 percent chance of survival. Trimester Three - Weeks 28 through 40
At the beginning of the third trimester, pregnancy becomes a bit more uncomfortable for a woman, while anticipation of the birth increases.

Pregnancy Guide, Stages of Pregnancy, Fetus Growth Week-by-Week Pregnancy Guide
Week-by-Week Pregnancy Guide
Trimester One - Weeks One through 12
First Trimester Fetal Development
Trimester Two - Weeks 13 through 27
Second Trimester Fetal Development
Trimester Three - Weeks 28 through 40
Third Trimester Fetal Development
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 Changes in circulation can cause breathing and gum problems, dizziness, and cramps. The growing uterus cramps the abdominal area, causing indigestion, heartburn, shortness of breath, and sleeping problems. Hormonal fluctuations can cause constipation and bladder and kidney infections, although mood swings and lethargy decrease. In the second half of the second trimester, the pregnancy is in "full swing"; the "bump" is fully visible, and a fetus born at the end of this trimester has strong chance of survival. Changes to a woman's body, and development of the fetus, are considerable during this time. Second Trimester Fetal Development
Weeks 13: The fetus has fully functioning nerves, organs, and muscles, and it flexes and kicks considerably. Week 14: The fetus's hormone production increases and sex organs develop.

Changes in circulation can cause breathing and gum problems, dizziness, and cramps. The growing uterus cramps the abdominal area, causing indigestion, heartburn, shortness of breath, and sleeping problems. Hormonal fluctuations can cause constipation and bladder and kidney infections, although mood swings and lethargy decrease. In the second half of the second trimester, the pregnancy is in "full swing"; the "bump" is fully visible, and a fetus born at the end of this trimester has strong chance of survival. Changes to a woman's body, and development of the fetus, are considerable during this time. Second Trimester Fetal Development
Weeks 13: The fetus has fully functioning nerves, organs, and muscles, and it flexes and kicks considerably. Week 14: The fetus's hormone production increases and sex organs develop.

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
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 11th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020. Products and services
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11th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020. Products and services
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Infants Remembered In Silence (IRIS) - Resources - Fetal Development Conception - 40 Weeks
 Sometime during this week or the next week, blood will begin to circulate between the baby and uterus and the placenta starts to function. Week 12

By this point, nearly all of the organs and structures of the fetus are formed. They will continue to grow and develop until delivery. Fingers and toes have separated and hair and nails begin to grow. The genitals begin to take on their gender characteristics. Amniotic fluid begins to accumulate as the baby's kidneys begin to produce and excrete urine. The muscles in the intestinal walls begin to practice peristalsis - contractions within the intestines that digest food. Week 13

As the baby continues to develop, the vocal cords begin to form. The face is looking more and more human each day as the eyes begin to move closer together instead of being on the sides of the head and the ears move to a normal position. It would be possible now to determine the baby's sex by looking at the genitals if we could only get close enough. (

Infants Remembered In Silence (IRIS) - Resources - Fetal Development Conception - 40 Weeks

Fetal development: The 3rd trimester - Mayo Clinic
Fetal development: The 3rd trimester
Week 28: Baby's eyes partially open
Week 29: Baby kicks and stretches
Week 30: Baby's hair grows
Week 31: Baby's rapid weight gain begins
Week 32: Baby practices breathing
Week 33: Baby detects light
Week 34: Baby's fingernails grow
Week 35: Baby's skin is smooth
Week 36: Baby takes up most of the amniotic sac
Week 37: Baby might turn head down
Week 38: Baby's toenails grow
Week 39: Baby's chest is prominent
Week 40: Your due date arrives
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 Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Patients/FAQs/Prenatal-Development-How-Your-Baby-Grows-During-Pregnancy. Accessed Feb. 25, 2020. American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth: Month to Month. 6th ed. American College of Obstetricians and Gynecologists;

Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Patients/FAQs/Prenatal-Development-How-Your-Baby-Grows-During-Pregnancy. Accessed Feb. 25, 2020. American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth: Month to Month. 6th ed. American College of Obstetricians and Gynecologists;

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
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 Week 4: Implantation
The rapidly dividing ball of cells — now known as a blastocyst — has begun to burrow into the uterine lining (endometrium). This process is called implantation. Within the blastocyst, the inner group of cells will become the embryo. The outer layer will give rise to part of the placenta, which will nourish your baby throughout the pregnancy. Week 5: Hormone levels increase
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Fetal development three weeks after conception
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Fetal development three weeks after conception
Fetal development three weeks after conception
By the end of the fifth week of pregnancy — three weeks after conception — your hormone levels are rising. The fifth week of pregnancy, or the third week after conception, the levels of HCG hormone produced by the blastocyst quickly increase. This signals your ovaries to stop releasing eggs and produce more estrogen and progesterone. Increased levels of these hormones stop your menstrual period, often the first sign of pregnancy, and fuel the growth of the placenta.

Fetal development: The 3rd trimester - Mayo Clinic
Fetal development: The 3rd trimester
Week 28: Baby's eyes partially open
Week 29: Baby kicks and stretches
Week 30: Baby's hair grows
Week 31: Baby's rapid weight gain begins
Week 32: Baby practices breathing
Week 33: Baby detects light
Week 34: Baby's fingernails grow
Week 35: Baby's skin is smooth
Week 36: Baby takes up most of the amniotic sac
Week 37: Baby might turn head down
Week 38: Baby's toenails grow
Week 39: Baby's chest is prominent
Week 40: Your due date arrives
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 Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020. Products and services
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Book: Mayo Clinic Guide to a Healthy Pregnancy

Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020. Products and services
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Book: Mayo Clinic Guide to a Healthy Pregnancy

Infants Remembered In Silence (IRIS) - Resources - Fetal Development Conception - 40 Weeks
 Week 11

Starting with this week, the baby is now called a fetus. The most critical part of the baby's development is over. This is a period of rapid growth, and the baby is about an inch or so in length at the beginning of the week and will be about 2 inches by the end of the week. The baby's head is about half its length. The eyelids will fuse shut, and the irises will begin to develop. Sometime during this week or the next week, blood will begin to circulate between the baby and uterus and the placenta starts to function. Week 12

By this point, nearly all of the organs and structures of the fetus are formed. They will continue to grow and develop until delivery. Fingers and toes have separated and hair and nails begin to grow. The genitals begin to take on their gender characteristics.

Week 11

Starting with this week, the baby is now called a fetus. The most critical part of the baby's development is over. This is a period of rapid growth, and the baby is about an inch or so in length at the beginning of the week and will be about 2 inches by the end of the week. The baby's head is about half its length. The eyelids will fuse shut, and the irises will begin to develop. Sometime during this week or the next week, blood will begin to circulate between the baby and uterus and the placenta starts to function. Week 12

By this point, nearly all of the organs and structures of the fetus are formed. They will continue to grow and develop until delivery. Fingers and toes have separated and hair and nails begin to grow. The genitals begin to take on their gender characteristics.

Pregnancy - week by week - Better Health Channel Pregnancy - week by week
Pregnancy - week by week
Summary
On this page
Conception
Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11
Week 12
Week 13
Week 14
Week 16
Week 18-20
Week 20
Week 24
Week 28
Week 32
Week 36
Week 40
Where to get help
Things to remember
View all healthy pregnancy
 Week 9
The eyes, mouth and tongue are forming. The tiny muscles allow the embryo to start moving about. Blood cells are being made by the embryo’s liver. Week 10
The embryo is now known as a fetus and is about 2.5 cm in length. All of the bodily organs are formed. The hands and feet, which previously looked like nubs or paddles, are now evolving fingers and toes. The brain is active and has brain waves. Week 11
Teeth are budding inside the gums. The tiny heart is developing further. Week 12
The fingers and toes are recognisable, but still stuck together with webs of skin.

Pregnancy - week by week - Better Health Channel

Pregnancy - week by week
Pregnancy - week by week
Summary
On this page
Conception
Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11
Week 12
Week 13
Week 14
Week 16
Week 18-20
Week 20
Week 24
Week 28
Week 32
Week 36
Week 40
Where to get help
Things to remember
View all healthy pregnancy

Week 9
The eyes, mouth and tongue are forming. The tiny muscles allow the embryo to start moving about. Blood cells are being made by the embryo’s liver. Week 10
The embryo is now known as a fetus and is about 2.5 cm in length. All of the bodily organs are formed. The hands and feet, which previously looked like nubs or paddles, are now evolving fingers and toes. The brain is active and has brain waves. Week 11
Teeth are budding inside the gums. The tiny heart is developing further. Week 12
The fingers and toes are recognisable, but still stuck together with webs of skin.

Fetal development: The 2nd trimester - Mayo Clinic
Fetal development: The 2nd trimester
Week 13: Urine forms
Week 14: Baby's sex becoming apparent
Week 15: Baby's scalp pattern develops
Week 16: Baby's eyes move
Week 17: Baby's toenails develop
Week 18: Baby begins to hear
Week 19: Baby develops protective coating
Week 20: The halfway point
Week 21: Baby can suck his or her thumb
Week 22: Baby's hair becomes visible
Week 23: Fingerprints and footprints form
Week 24: Baby's skin is wrinkled
Week 25: Baby responds to your voice
Week 26: Baby's lungs develop
Week 27: 2nd trimester ends
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 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020. Frequently asked questions: Pregnancy FAQ156: Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Patients/FAQs/Prenatal-Development-How-Your-Baby-Grows-During-Pregnancy. Accessed June 6, 2017.

Fetal development: The 2nd trimester - Mayo Clinic

Fetal development: The 2nd trimester
Week 13: Urine forms
Week 14: Baby's sex becoming apparent
Week 15: Baby's scalp pattern develops
Week 16: Baby's eyes move
Week 17: Baby's toenails develop
Week 18: Baby begins to hear
Week 19: Baby develops protective coating
Week 20: The halfway point
Week 21: Baby can suck his or her thumb
Week 22: Baby's hair becomes visible
Week 23: Fingerprints and footprints form
Week 24: Baby's skin is wrinkled
Week 25: Baby responds to your voice
Week 26: Baby's lungs develop
Week 27: 2nd trimester ends
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2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020. Frequently asked questions: Pregnancy FAQ156: Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Patients/FAQs/Prenatal-Development-How-Your-Baby-Grows-During-Pregnancy. Accessed June 6, 2017.

Fetal development: The 2nd trimester - Mayo Clinic
Fetal development: The 2nd trimester
Week 13: Urine forms
Week 14: Baby's sex becoming apparent
Week 15: Baby's scalp pattern develops
Week 16: Baby's eyes move
Week 17: Baby's toenails develop
Week 18: Baby begins to hear
Week 19: Baby develops protective coating
Week 20: The halfway point
Week 21: Baby can suck his or her thumb
Week 22: Baby's hair becomes visible
Week 23: Fingerprints and footprints form
Week 24: Baby's skin is wrinkled
Week 25: Baby responds to your voice
Week 26: Baby's lungs develop
Week 27: 2nd trimester ends
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 Fetal development: The 2nd trimester - Mayo Clinic
Fetal development: The 2nd trimester
Fetal development takes on new meaning in the second trimester. Highlights might include finding out your baby's sex and feeling your baby move. By Mayo Clinic Staff
As your pregnancy progresses, your baby might begin to seem more real. Two months ago, your baby was a cluster of cells. Now he or she has functioning organs, nerves and muscles. Find out what happens during the second trimester by checking out this weekly calendar of events. Keep in mind that measurements are approximate. Week 13:

Fetal development: The 2nd trimester - Mayo Clinic
Fetal development: The 2nd trimester
Fetal development takes on new meaning in the second trimester. Highlights might include finding out your baby's sex and feeling your baby move. By Mayo Clinic Staff
As your pregnancy progresses, your baby might begin to seem more real. Two months ago, your baby was a cluster of cells. Now he or she has functioning organs, nerves and muscles. Find out what happens during the second trimester by checking out this weekly calendar of events. Keep in mind that measurements are approximate. Week 13:

Fetal development: The 2nd trimester - Mayo Clinic
Fetal development: The 2nd trimester
Week 13: Urine forms
Week 14: Baby's sex becoming apparent
Week 15: Baby's scalp pattern develops
Week 16: Baby's eyes move
Week 17: Baby's toenails develop
Week 18: Baby begins to hear
Week 19: Baby develops protective coating
Week 20: The halfway point
Week 21: Baby can suck his or her thumb
Week 22: Baby's hair becomes visible
Week 23: Fingerprints and footprints form
Week 24: Baby's skin is wrinkled
Week 25: Baby responds to your voice
Week 26: Baby's lungs develop
Week 27: 2nd trimester ends
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 Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020. Frequently asked questions: Pregnancy FAQ156:

Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020. Frequently asked questions: Pregnancy FAQ156:

Fetal development: The 3rd trimester - Mayo Clinic
Fetal development: The 3rd trimester
Week 28: Baby's eyes partially open
Week 29: Baby kicks and stretches
Week 30: Baby's hair grows
Week 31: Baby's rapid weight gain begins
Week 32: Baby practices breathing
Week 33: Baby detects light
Week 34: Baby's fingernails grow
Week 35: Baby's skin is smooth
Week 36: Baby takes up most of the amniotic sac
Week 37: Baby might turn head down
Week 38: Baby's toenails grow
Week 39: Baby's chest is prominent
Week 40: Your due date arrives
Products and Services
 Office on Women's Health. https://www.womenshealth.gov/pregnancy/youre-pregnant-now-what/stages-pregnancy. Accessed Feb. 25, 2020. Frequently asked questions: Pregnancy FAQ 156: Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Patients/FAQs/Prenatal-Development-How-Your-Baby-Grows-During-Pregnancy. Accessed Feb. 25, 2020.

Office on Women's Health. https://www.womenshealth.gov/pregnancy/youre-pregnant-now-what/stages-pregnancy. Accessed Feb. 25, 2020. Frequently asked questions: Pregnancy FAQ 156: Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Patients/FAQs/Prenatal-Development-How-Your-Baby-Grows-During-Pregnancy. Accessed Feb. 25, 2020.

Fetal development: The 1st trimester - Mayo Clinic
Fetal development: The 1st trimester
Weeks 1 and 2: Getting ready
Week 3: Fertilization
Week 4: Implantation
Week 5: Hormone levels increase
Week 6: The neural tube closes
Week 7: Baby's head develops
Week 8: Baby's nose forms
Week 9: Baby's toes appear
Week 10: Baby's elbows bend
Week 11: Baby's genitals develop
Week 12: Baby's fingernails form
Products and Services
 If more than one egg is released and fertilized or if the fertilized egg splits into two, you might have multiple zygotes. The zygote typically has 46 chromosomes — 23 from the biological mother and 23 from the biological father. These chromosomes help determine your baby's sex and physical traits. Soon after fertilization, the zygote travels down the fallopian tube toward the uterus. At the same time, it will begin dividing to form a cluster of cells resembling a tiny raspberry — a morula. Week 4: Implantation
The rapidly dividing ball of cells — now known as a blastocyst — has begun to burrow into the uterine lining (endometrium). This process is called implantation. Within the blastocyst, the inner group of cells will become the embryo. The outer layer will give rise to part of the placenta, which will nourish your baby throughout the pregnancy.

If more than one egg is released and fertilized or if the fertilized egg splits into two, you might have multiple zygotes. The zygote typically has 46 chromosomes — 23 from the biological mother and 23 from the biological father. These chromosomes help determine your baby's sex and physical traits. Soon after fertilization, the zygote travels down the fallopian tube toward the uterus. At the same time, it will begin dividing to form a cluster of cells resembling a tiny raspberry — a morula. Week 4: Implantation
The rapidly dividing ball of cells — now known as a blastocyst — has begun to burrow into the uterine lining (endometrium). This process is called implantation. Within the blastocyst, the inner group of cells will become the embryo. The outer layer will give rise to part of the placenta, which will nourish your baby throughout the pregnancy.

Fetal development: The 3rd trimester - Mayo Clinic
Fetal development: The 3rd trimester
Week 28: Baby's eyes partially open
Week 29: Baby kicks and stretches
Week 30: Baby's hair grows
Week 31: Baby's rapid weight gain begins
Week 32: Baby practices breathing
Week 33: Baby detects light
Week 34: Baby's fingernails grow
Week 35: Baby's skin is smooth
Week 36: Baby takes up most of the amniotic sac
Week 37: Baby might turn head down
Week 38: Baby's toenails grow
Week 39: Baby's chest is prominent
Week 40: Your due date arrives
Products and Services
 2015. Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020. Products and services
See more In-depth
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Book:

2015. Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 25, 2020. Products and services
See more In-depth
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Book:

Fetal development: The 2nd trimester - Mayo Clinic
Fetal development: The 2nd trimester
Week 13: Urine forms
Week 14: Baby's sex becoming apparent
Week 15: Baby's scalp pattern develops
Week 16: Baby's eyes move
Week 17: Baby's toenails develop
Week 18: Baby begins to hear
Week 19: Baby develops protective coating
Week 20: The halfway point
Week 21: Baby can suck his or her thumb
Week 22: Baby's hair becomes visible
Week 23: Fingerprints and footprints form
Week 24: Baby's skin is wrinkled
Week 25: Baby responds to your voice
Week 26: Baby's lungs develop
Week 27: 2nd trimester ends
Products and Services
 Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Patients/FAQs/Prenatal-Development-How-Your-Baby-Grows-During-Pregnancy. Accessed June 6, 2017. Pregnancy: Stages of pregnancy. Office on Women's Health. . https://www.womenshealth.gov/pregnancy/youre-pregnant-now-what/stages-pregnancy. Accessed Feb. 25, 2020.

Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Patients/FAQs/Prenatal-Development-How-Your-Baby-Grows-During-Pregnancy. Accessed June 6, 2017. Pregnancy: Stages of pregnancy. Office on Women's Health. . https://www.womenshealth.gov/pregnancy/youre-pregnant-now-what/stages-pregnancy. Accessed Feb. 25, 2020.

23.4: Fetal Stage - Biology LibreTexts 23.4: Fetal Stage
23.4: Fetal Stage
Hello, Baby
Defining the Fetal Stage
Fetal Development
Weeks 9 to 15
Weeks 16 to 26
Weeks 27 to 38
Fetal Circulation
Prenatal Circulation
Postnatal Circulation
Birth Weight
Viability of the Fetus
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Attributions
 The fetus’s movements become more forceful, and the movements stimulate further development of the muscles. The intestines develop sufficiently that small amounts of sugars can be absorbed from the amniotic fluid that is swallowed. Virtually all of the fetus’s nutrients, however, still come from the mother’s blood via the placenta. The fetus develops a thick waxy coating called vernix. This coating protects the fetus’s skin from becoming chapped or irritated by amniotic fluid. Weeks 27 to 38
During weeks 27 to 38 after fertilization, the bones of the fetus complete their development. The fetus also grows rapidly during these final weeks, and its body fat increases substantially. Its formerly wrinkled skin starts to plump out as layers of subcutaneous fat are deposited. Additional changes that occur in the fetus during weeks 27 to 38 include the following: The fetus’s head hair grows thicker and coarser while the lanugo is shed.

23.4: Fetal Stage - Biology LibreTexts

23.4: Fetal Stage
23.4: Fetal Stage
Hello, Baby
Defining the Fetal Stage
Fetal Development
Weeks 9 to 15
Weeks 16 to 26
Weeks 27 to 38
Fetal Circulation
Prenatal Circulation
Postnatal Circulation
Birth Weight
Viability of the Fetus
Explore More
Attributions

Fetal development: The 3rd trimester - Mayo Clinic
Fetal development: The 3rd trimester
Week 28: Baby's eyes partially open
Week 29: Baby kicks and stretches
Week 30: Baby's hair grows
Week 31: Baby's rapid weight gain begins
Week 32: Baby practices breathing
Week 33: Baby detects light
Week 34: Baby's fingernails grow
Week 35: Baby's skin is smooth
Week 36: Baby takes up most of the amniotic sac
Week 37: Baby might turn head down
Week 38: Baby's toenails grow
Week 39: Baby's chest is prominent
Week 40: Your due date arrives
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 American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth: Month to Month. 6th ed. American College of Obstetricians and Gynecologists; 2015. Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed.

American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth: Month to Month. 6th ed. American College of Obstetricians and Gynecologists; 2015. Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed.

Your Developing Baby, Week by Week | Parents Your Developing Baby, Week by Week
Your Developing Baby, Week by Week
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Fetal Development Pregnancy week 4
Credit: Med ART Studios
So what's going on in your womb this week? Your embryo may be minuscule, but trust us: Super-important developments are already under way. This week the embryo splits into two parts. One half will become the placenta, a special tissue that delivers must-have nutrients and oxygen to your baby throughout your entire pregnancy. In the other half, the embryo itself continues to grow, and a sheet of cells has just begun to create the neural tube, where your baby's brain, spinal cord and backbone will ultimately form. 4 of 42
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Pregnancy week 5
Credit: Med ART Studios
This week, your baby's ticker will start beating for the first time! ( Neither you nor your doctor can hear it yet, but it may be possible to see the movement on an ultrasound .)

Your Developing Baby, Week by Week | Parents

Your Developing Baby, Week by Week
Your Developing Baby, Week by Week
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Week 4
Fetal Development Pregnancy week 4
Credit: Med ART Studios
So what's going on in your womb this week? Your embryo may be minuscule, but trust us: Super-important developments are already under way. This week the embryo splits into two parts. One half will become the placenta, a special tissue that delivers must-have nutrients and oxygen to your baby throughout your entire pregnancy. In the other half, the embryo itself continues to grow, and a sheet of cells has just begun to create the neural tube, where your baby's brain, spinal cord and backbone will ultimately form. 4 of 42
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Week 5
Pregnancy week 5
Credit: Med ART Studios
This week, your baby's ticker will start beating for the first time! ( Neither you nor your doctor can hear it yet, but it may be possible to see the movement on an ultrasound .)

Pregnancy - week by week - Better Health Channel Pregnancy - week by week
Pregnancy - week by week
Summary
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 The embryo has developed its placenta and amniotic sac. The placenta is burrowing into the uterine wall to access oxygen and nutrients from the mother’s bloodstream. Week 8
The embryo is now around 1.3 cm in length. The rapidly growing spinal cord looks like a tail. The head is disproportionately large. Week 9
The eyes, mouth and tongue are forming. The tiny muscles allow the embryo to start moving about. Blood cells are being made by the embryo’s liver. Week 10
The embryo is now known as a fetus and is about 2.5 cm in length. All of the bodily organs are formed.

The embryo has developed its placenta and amniotic sac. The placenta is burrowing into the uterine wall to access oxygen and nutrients from the mother’s bloodstream. Week 8
The embryo is now around 1.3 cm in length. The rapidly growing spinal cord looks like a tail. The head is disproportionately large. Week 9
The eyes, mouth and tongue are forming. The tiny muscles allow the embryo to start moving about. Blood cells are being made by the embryo’s liver. Week 10
The embryo is now known as a fetus and is about 2.5 cm in length. All of the bodily organs are formed.

How A Fetus Grows | HowStuffWorks How A Fetus Grows
How A Fetus Grows
How A Fetus Develops in the First Trimester
How A Fetus Develops in the Second Trimester
How A Fetus Develops in the Third Trimester
ABOUT THE CONSULTANT:
Citation
 Publications International, Ltd.
In the first weeks after conception, the single cell rapidly divides into many cells. A hollow ball of cells is formed and becomes attached to the wall of the uterus (womb). Some of the cells become the placenta; the rest become the embryo. The latter group of cells develops into a four-layered disk. Each layer is converted into different areas of the body. The outer layer, or ectoderm, for example, develops into skin, hair, nails, and the nervous system. The inner layer, or endoderm, develops into the intestines and lungs. The middle layers develop into the heart, bones, and muscles. By three weeks after fertilization, or about one week after the first period is missed, the embryo is 1/10 inch long and has an oval shape.

How A Fetus Grows | HowStuffWorks

How A Fetus Grows
How A Fetus Grows
How A Fetus Develops in the First Trimester
How A Fetus Develops in the Second Trimester
How A Fetus Develops in the Third Trimester
ABOUT THE CONSULTANT:
Citation

Publications International, Ltd.
In the first weeks after conception, the single cell rapidly divides into many cells. A hollow ball of cells is formed and becomes attached to the wall of the uterus (womb). Some of the cells become the placenta; the rest become the embryo. The latter group of cells develops into a four-layered disk. Each layer is converted into different areas of the body. The outer layer, or ectoderm, for example, develops into skin, hair, nails, and the nervous system. The inner layer, or endoderm, develops into the intestines and lungs. The middle layers develop into the heart, bones, and muscles. By three weeks after fertilization, or about one week after the first period is missed, the embryo is 1/10 inch long and has an oval shape.

Week 10 The Embryo is now a Fetus - Month 3 Fetal development information of your baby weeks months trimesters Week Ten: Embryo is now a Fetus
Weeks, Months and Trimesters Guides
Week Ten: Embryo is now a Fetus
Week By Week Pregnancy Calendar
 9 inch to 1. 2 inches (22 to 30mm), weight 0. 07 ounce (2gm). They are now on the way to forming their testicles or ovaries, getting ready for the next generation. Until the ninth week of fetus development, the fetal reproductive apparatus is the same one for the both sexes. The head is still large and curves into chest. Each week your uterus grows larger with the baby growing inside it. You may begin to see your waistline growing thicker by this time. A pelvic exam will detect that your uterus has grown from it's normal, size of your fist, to a little bigger than a grapefruit. First trimester:

Week 10 The Embryo is now a Fetus - Month 3 Fetal development information of your baby weeks months trimesters

Week Ten: Embryo is now a Fetus
Weeks, Months and Trimesters Guides
Week Ten: Embryo is now a Fetus
Week By Week Pregnancy Calendar

9 inch to 1. 2 inches (22 to 30mm), weight 0. 07 ounce (2gm). They are now on the way to forming their testicles or ovaries, getting ready for the next generation. Until the ninth week of fetus development, the fetal reproductive apparatus is the same one for the both sexes. The head is still large and curves into chest. Each week your uterus grows larger with the baby growing inside it. You may begin to see your waistline growing thicker by this time. A pelvic exam will detect that your uterus has grown from it's normal, size of your fist, to a little bigger than a grapefruit. First trimester:

1st Trimester Fetal Growth: Weeks 9 Through 13 | Parents Fetal Development Weeks 9 Through 13
Fetal Development Weeks 9 Through 13
Week 9
Week 10
Week 11
Week 12
Week 13
 But don't rush to get your ultrasound just yet- those tiny sex organs won't be visible for another six to eight weeks. The baby's muscles are growing and getting stronger, and its movements are increasing. Elbows, knees, and other limb joints are distinguishable. Any day now, toenails will appear at the tips of budding toes. Week 10
Hooray! Your baby is almost ready to graduate! He's entered his final stage of embryonic development at this point, and within the next week he'll make the big leap from "embryo" to "fetus." All of his essential internal and external structures are in place; in other words, he has all of the same body components that you do. He's over one and one-quarter inches long now, or about the length of your index finger from its tip to the first joint.

1st Trimester Fetal Growth: Weeks 9 Through 13 | Parents

Fetal Development Weeks 9 Through 13
Fetal Development Weeks 9 Through 13
Week 9
Week 10
Week 11
Week 12
Week 13

But don't rush to get your ultrasound just yet- those tiny sex organs won't be visible for another six to eight weeks. The baby's muscles are growing and getting stronger, and its movements are increasing. Elbows, knees, and other limb joints are distinguishable. Any day now, toenails will appear at the tips of budding toes. Week 10
Hooray! Your baby is almost ready to graduate! He's entered his final stage of embryonic development at this point, and within the next week he'll make the big leap from "embryo" to "fetus." All of his essential internal and external structures are in place; in other words, he has all of the same body components that you do. He's over one and one-quarter inches long now, or about the length of your index finger from its tip to the first joint.

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Week 11
Pregnancy week 11 female
Credit: Med ART Studios
Did you know your baby can breathe underwater? She's doing it right now. At weeks 10 and 11, the fetus will start to inhale and exhale small amounts of amniotic fluid, which helps your baby's lungs to grow and develop. Also this week, your baby's ears are scooting up to the sides of his head. Sure, your baby's head is still disproportionally large compared to the rest of his body, but this will even out as he continues to grow and develop in the womb. Boy or Girl? Find out now. 11 of 42
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Pregnancy week 12
Credit: Med ART Studios
As your baby's muscles start to bulk up at this stage, he's getting busy stretching and kicking.

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Pregnancy week 11 female
Credit: Med ART Studios
Did you know your baby can breathe underwater? She's doing it right now. At weeks 10 and 11, the fetus will start to inhale and exhale small amounts of amniotic fluid, which helps your baby's lungs to grow and develop. Also this week, your baby's ears are scooting up to the sides of his head. Sure, your baby's head is still disproportionally large compared to the rest of his body, but this will even out as he continues to grow and develop in the womb. Boy or Girl? Find out now. 11 of 42
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Pregnancy week 12
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As your baby's muscles start to bulk up at this stage, he's getting busy stretching and kicking.

23.4: Fetal Stage - Biology LibreTexts 23.4: Fetal Stage
23.4: Fetal Stage
Hello, Baby
Defining the Fetal Stage
Fetal Development
Weeks 9 to 15
Weeks 16 to 26
Weeks 27 to 38
Fetal Circulation
Prenatal Circulation
Postnatal Circulation
Birth Weight
Viability of the Fetus
Explore More
Attributions
 Weeks 27 to 38
During weeks 27 to 38 after fertilization, the bones of the fetus complete their development. The fetus also grows rapidly during these final weeks, and its body fat increases substantially. Its formerly wrinkled skin starts to plump out as layers of subcutaneous fat are deposited. Additional changes that occur in the fetus during weeks 27 to 38 include the following: The fetus’s head hair grows thicker and coarser while the lanugo is shed. The waxy vernix covering the fetus becomes thicker at first, but most of it will disappear by birth. In preparation for breathing after birth, the fetus will repeatedly mimic breathing by moving the diaphragm. By about week 32, the lungs are likely to be fully developed so the fetus can breathe on its own, should it be born this early. The fetus can not only hear and feel touch, but its eyes can now detect light. In fact, the pupils can constrict and dilate in response to light.

23.4: Fetal Stage - Biology LibreTexts

Fetal development: The 2nd trimester - Mayo Clinic
Fetal development: The 2nd trimester
Week 13: Urine forms
Week 14: Baby's sex becoming apparent
Week 15: Baby's scalp pattern develops
Week 16: Baby's eyes move
Week 17: Baby's toenails develop
Week 18: Baby begins to hear
Week 19: Baby develops protective coating
Week 20: The halfway point
Week 21: Baby can suck his or her thumb
Week 22: Baby's hair becomes visible
Week 23: Fingerprints and footprints form
Week 24: Baby's skin is wrinkled
Week 25: Baby responds to your voice
Week 26: Baby's lungs develop
Week 27: 2nd trimester ends
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 June 30, 2020
Show references
American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth Month to Month. 6th ed. American College of Obstetricians and Gynecologists; 2015. Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed. Elsevier;

June 30, 2020
Show references
American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth Month to Month. 6th ed. American College of Obstetricians and Gynecologists; 2015. Moore KL, et al. The Developing Human: Clinically Oriented Embryology. 11th ed. Elsevier;

Fetus - Wikipedia Fetus
Fetus
Contents
Etymology
Development
Weeks 9 to 16 (2 to 3.6 months)
Weeks 17 to 25 (3.6 to 6.6 months)
Weeks 26 to 38 (6.6 to 8.6 months)
Variation in growth
Viability
Circulatory system
Before birth
Postnatal development
Immune system
Developmental problems
Fetal pain
Legal and social issues
Other animals
See also
References
External links
 Fetus - Wikipedia
Fetus
Language
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Edit
This article is about the stage of prenatal development. For other uses, see Fetus (disambiguation). "Foetus" redirects here. For the band, see Foetus (band). For the film, see Foetus (film). A fetus or foetus ( / ˈfiːtəs /; plural fetuses, feti, foetuses, or foeti) is the unborn offspring of an animal that develops from an embryo. Following embryonic development the fetal stage of development takes place. In human prenatal development, fetal development begins from the ninth week after fertilisation (or eleventh week gestational age) and continues until birth. Prenatal development is a continuum, with no clear defining feature distinguishing an embryo from a fetus.

Fetus - Wikipedia

Fetus
Fetus
Contents
Etymology
Development
Weeks 9 to 16 (2 to 3.6 months)
Weeks 17 to 25 (3.6 to 6.6 months)
Weeks 26 to 38 (6.6 to 8.6 months)
Variation in growth
Viability
Circulatory system
Before birth
Postnatal development
Immune system
Developmental problems
Fetal pain
Legal and social issues
Other animals
See also
References
External links

Fetus - Wikipedia
Fetus
Language
Watch
Edit
This article is about the stage of prenatal development. For other uses, see Fetus (disambiguation). "Foetus" redirects here. For the band, see Foetus (band). For the film, see Foetus (film). A fetus or foetus ( / ˈfiːtəs /; plural fetuses, feti, foetuses, or foeti) is the unborn offspring of an animal that develops from an embryo. Following embryonic development the fetal stage of development takes place. In human prenatal development, fetal development begins from the ninth week after fertilisation (or eleventh week gestational age) and continues until birth. Prenatal development is a continuum, with no clear defining feature distinguishing an embryo from a fetus.

Week 10 The Embryo is now a Fetus - Month 3 Fetal development information of your baby weeks months trimesters Week Ten: Embryo is now a Fetus
Weeks, Months and Trimesters Guides
Week Ten: Embryo is now a Fetus
Week By Week Pregnancy Calendar
 The mouth cavity and the nose are joined. The ears and nose can now be seen clearly. Fingerprints are already evident in the skin. Nipples and hair follicles begin to form. The unborn baby is now called a fetus. Though the fetus is constantly moving, you will not be able to actually feel fetal movement for several more weeks. All of the organs, muscles, and nerves are in place and beginning to function. As the hands and feet develop fingers and toes, they have lost their paddle like look. The touch pads on the fingers form and already have fingerprints. During this week of pregnancy the crown to rump length of the fetus is 0.

The mouth cavity and the nose are joined. The ears and nose can now be seen clearly. Fingerprints are already evident in the skin. Nipples and hair follicles begin to form. The unborn baby is now called a fetus. Though the fetus is constantly moving, you will not be able to actually feel fetal movement for several more weeks. All of the organs, muscles, and nerves are in place and beginning to function. As the hands and feet develop fingers and toes, they have lost their paddle like look. The touch pads on the fingers form and already have fingerprints. During this week of pregnancy the crown to rump length of the fetus is 0.

Your Developing Baby, Week by Week | Parents Your Developing Baby, Week by Week
Your Developing Baby, Week by Week
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Week 10
Pregnancy week 10
Credit: Med ART Studios
Up until now your baby was classified as an embryo, but by the end of this week he will be a fetus and lots of changes are on the way. Paddle-like, or webbed, hands and feet will now separate into fingers and toes, bones will begin to harden and his kidneys are now producing urine. Most impressive? At this point your baby's brain is developing at astounding rates -- nearly 250,000 neurons are forming every minute! The end of the embryonic stage also marks a turning point for development dangers -- your baby is much less susceptible to them now. Boy or Girl? Find out now.

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Week 10
Pregnancy week 10
Credit: Med ART Studios
Up until now your baby was classified as an embryo, but by the end of this week he will be a fetus and lots of changes are on the way. Paddle-like, or webbed, hands and feet will now separate into fingers and toes, bones will begin to harden and his kidneys are now producing urine. Most impressive? At this point your baby's brain is developing at astounding rates -- nearly 250,000 neurons are forming every minute! The end of the embryonic stage also marks a turning point for development dangers -- your baby is much less susceptible to them now. Boy or Girl? Find out now.

How Your Baby Grows in Pregnancy How Your Baby Grows in Pregnancy
How Your Baby Grows in Pregnancy
Pregnancy Overviews
Fetal Development
Is Your Baby a Girl or a Boy?
 Pregnancy Overviews
The amount of growth both physically and emotionally in pregnancy is vast and rapid. There are many ways to watch a pregnancy proceed. Some prefer to look at pregnancy from the standpoint of the three trimesters, while others enjoy a pregnancy week by week format. For those that want a middle ground, there is also a monthly view of pregnancy. Each has the basics to more in-depth coverage of both fetal development and how the changes occur in the mother's body. Fetal Development
Pregnancy is amazing to go from being a couple of cells to a total, albeit small, a human being in a period of about nine months! Most people enjoy tracking their baby's developments during pregnancy. There are many ways to peak into the uterus during this time. Sometimes your doctor or midwife will order an ultrasound exam or genetic testing like amniocentesis or chorionic villus sampling (CVS). You may also enjoy reading about your baby's growth.

How Your Baby Grows in Pregnancy

How Your Baby Grows in Pregnancy
How Your Baby Grows in Pregnancy
Pregnancy Overviews
Fetal Development
Is Your Baby a Girl or a Boy?

How A Fetus Grows | HowStuffWorks How A Fetus Grows
How A Fetus Grows
How A Fetus Develops in the First Trimester
How A Fetus Develops in the Second Trimester
How A Fetus Develops in the Third Trimester
ABOUT THE CONSULTANT:
Citation
 IT IS NOT INTENDED TO PROVIDE MEDICAL ADVICE. Neither the Editors of Consumer Guide (R), Publications International, Ltd., the author nor publisher take responsibility for any possible consequences from any treatment, procedure, exercise, dietary modification, action or application of medication which results from reading or following the information contained in this information. The publication of this information does not constitute the practice of medicine, and this information does not replace the advice of your physician or other health care provider. Before undertaking any course of treatment, the reader must seek the advice of their physician or other health care provider. Advertisement
Contents
How A Fetus Develops in the First Trimester
How A Fetus Develops in the Second Trimester
How A Fetus Develops in the Third Trimester
How A Fetus Develops in the First Trimester
By the end of the first trimester the organs of the fetus are visible. Publications International, Ltd.
In the first weeks after conception, the single cell rapidly divides into many cells. A hollow ball of cells is formed and becomes attached to the wall of the uterus (womb). Some of the cells become the placenta; the rest become the embryo. The latter group of cells develops into a four-layered disk.

How A Fetus Grows | HowStuffWorks

1st Trimester Fetal Growth: Weeks 9 Through 13 | Parents Fetal Development Weeks 9 Through 13
Fetal Development Weeks 9 Through 13
Week 9
Week 10
Week 11
Week 12
Week 13
 Taste buds are dimpling the surface of a miniscule tongue. Eyelids lay half-closed close over tiny eyes, which already have some of the color they'll have at birth. Week 11
Take a moment to celebrate with your baby this week: you've both reached a milestone. Risks of serous malformations drop sharply at this point in your pregnancy, and so do risks of miscarriage. The major work of generating organs, limbs, and other body parts is mostly finished. At this point, your baby has made the transition from embryo to fetus. Afloat in about 1.5 ounces of warm amniotic bathwater, he's now about as long as a paper clip -- and a lot more interesting! In less time than an average school semester, your baby has grown from a single-celled organism to a complex being made up of millions of differentiated cells. Now the process is less about bringing body parts into being and more about allowing those parts to grow and develop.

Taste buds are dimpling the surface of a miniscule tongue. Eyelids lay half-closed close over tiny eyes, which already have some of the color they'll have at birth. Week 11
Take a moment to celebrate with your baby this week: you've both reached a milestone. Risks of serous malformations drop sharply at this point in your pregnancy, and so do risks of miscarriage. The major work of generating organs, limbs, and other body parts is mostly finished. At this point, your baby has made the transition from embryo to fetus. Afloat in about 1.5 ounces of warm amniotic bathwater, he's now about as long as a paper clip -- and a lot more interesting! In less time than an average school semester, your baby has grown from a single-celled organism to a complex being made up of millions of differentiated cells. Now the process is less about bringing body parts into being and more about allowing those parts to grow and develop.

Month 1 Fetal development information How your baby is developing growing inside you over first months trimesters Month 1: Embryo starts to grow
Weeks, Months and Trimesters Guides
Month 1: Embryo starts to grow
Week By Week Pregnancy Calendar
 Stop smoking and cut down on alcohol, check your work environment for hazardous conditions, and take care when handling pets to avoid contracting toxoplasmosis. Avoid changing cat litter for there is a risk of toxoplasmosis. Let someone else do this duty for while. Toxoplasmosis can cause genetic defects, but most women who have cats have already had toxoplasmosis, and just believed it to be the flu. So don't get rid of the cat, just let someone else change the litter. Week by week: First trimester ultrasound scan pictures
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Month 1 Fetal development information How your baby is developing growing inside you over first months trimesters

Month 1: Embryo starts to grow
Weeks, Months and Trimesters Guides
Month 1: Embryo starts to grow
Week By Week Pregnancy Calendar

Your Developing Baby, Week by Week | Parents Your Developing Baby, Week by Week
Your Developing Baby, Week by Week
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 One half will become the placenta, a special tissue that delivers must-have nutrients and oxygen to your baby throughout your entire pregnancy. In the other half, the embryo itself continues to grow, and a sheet of cells has just begun to create the neural tube, where your baby's brain, spinal cord and backbone will ultimately form. 4 of 42
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Week 5
Pregnancy week 5
Credit: Med ART Studios
This week, your baby's ticker will start beating for the first time! ( Neither you nor your doctor can hear it yet, but it may be possible to see the movement on an ultrasound .) And your little one has been really busy growing! The embryo now has three distinct layers: the outer ectoderm, which will form the nervous system, ears, eyes, inner ear and many connective tissues; the endoderm, or inner layer, which will grow into internal organs like the lungs, intestines and bladder; and the middle mesoderm, which will eventually make way for the heart and circulatory system.

Pregnancy week by week Pregnancy week by week
Pregnancy week by week
Weeks 1-2
Weeks 3-4
Week 5
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 The placenta grows in the uterus and supplies your baby with food and oxygen through the umbilical cord. Week 5
Your baby's neural tube forms. The neural tube becomes your baby's brain, spinal cord and backbone. Tiny buds start to appear that become your baby's arms and legs. Your baby's heart and lungs are developing, and your baby's heart starts to beat. Week 6
Your baby's heart beats about 105 times a minute. Her nose, mouth, fingers, toes and ears are forming and begin to take shape. Week 7
Your baby's bones start to form but are still soft. They harden as you get farther along in your pregnancy. She now has eyelids, but they stay shut.

Pregnancy week by week

Pregnancy week by week
Pregnancy week by week
Weeks 1-2
Weeks 3-4
Week 5
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Week 10
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Week 33
Week 34
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Week 40

The placenta grows in the uterus and supplies your baby with food and oxygen through the umbilical cord. Week 5
Your baby's neural tube forms. The neural tube becomes your baby's brain, spinal cord and backbone. Tiny buds start to appear that become your baby's arms and legs. Your baby's heart and lungs are developing, and your baby's heart starts to beat. Week 6
Your baby's heart beats about 105 times a minute. Her nose, mouth, fingers, toes and ears are forming and begin to take shape. Week 7
Your baby's bones start to form but are still soft. They harden as you get farther along in your pregnancy. She now has eyelids, but they stay shut.

Pregnancy week by week Pregnancy week by week
Pregnancy week by week
Weeks 1-2
Weeks 3-4
Week 5
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Week 40
 Her organs are fully formed and continue to develop. On an ultrasound, it may look like your baby's breathing and swallowing. Week 14
Your baby starts to move her eyes. Her nose and taste buds are developing. Her skin starts to thicken, and hair follicles under her skin begin to grow. Your baby opens and closes her hands and brings them to her mouth. Week 15
Your baby is very active! She flips and rolls around inside you. You may begin to feel her move. Her bones are growing strong, and you may be able to see them during an ultrasound.

Pregnancy week by week

Her organs are fully formed and continue to develop. On an ultrasound, it may look like your baby's breathing and swallowing. Week 14
Your baby starts to move her eyes. Her nose and taste buds are developing. Her skin starts to thicken, and hair follicles under her skin begin to grow. Your baby opens and closes her hands and brings them to her mouth. Week 15
Your baby is very active! She flips and rolls around inside you. You may begin to feel her move. Her bones are growing strong, and you may be able to see them during an ultrasound.

Your Developing Baby, Week by Week | Parents Your Developing Baby, Week by Week
Your Developing Baby, Week by Week
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 Your Developing Baby, Week by Week | Parents
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Stages of Pregnancy Week by Week
Your Developing Baby, Week by Week
Your Developing Baby, Week by Week
By Julie Knapp
March 16, 2014
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Your baby begins as a tiny cluster of cells, but during the nine-month process of pregnancy she becomes an amazing baby with facial features, a beating heart and kicking legs. Find out what's happening with baby's development week by week. Start Slideshow
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Week 1
pregnancy week 1 uterus
Credit: Med ART Studios
Baby? What baby? This concept may be a little hard to wrap your head around, but even though you're technically in the first week of pregnancy, you're not quite expecting -- yet. Here's the deal: Because it's generally impossible to know the exact moment of conception, most healthcare providers count 40 weeks from the first day of your last menstrual period (LMP) to calculate your due date. According to this method, they date the beginning of "pregnancy" from about two weeks before the sperm penetrates the egg -- which is where you are right now.

Pregnancy week by week Pregnancy week by week
Pregnancy week by week
Weeks 1-2
Weeks 3-4
Week 5
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 Week 12
Your baby's hands develop faster than her feet. She moves around, but you may not be able to feel her move yet. She's about 2 inches long and weighs about ½ an ounce. Week 13
This is the start of your second trimester! Your baby's growing fast. Her organs are fully formed and continue to develop. On an ultrasound, it may look like your baby's breathing and swallowing. Week 14
Your baby starts to move her eyes. Her nose and taste buds are developing. Her skin starts to thicken, and hair follicles under her skin begin to grow.

Pregnancy week by week

Week 12
Your baby's hands develop faster than her feet. She moves around, but you may not be able to feel her move yet. She's about 2 inches long and weighs about ½ an ounce. Week 13
This is the start of your second trimester! Your baby's growing fast. Her organs are fully formed and continue to develop. On an ultrasound, it may look like your baby's breathing and swallowing. Week 14
Your baby starts to move her eyes. Her nose and taste buds are developing. Her skin starts to thicken, and hair follicles under her skin begin to grow.

Week 10 The Embryo is now a Fetus - Month 3 Fetal development information of your baby weeks months trimesters Week Ten: Embryo is now a Fetus
Weeks, Months and Trimesters Guides
Week Ten: Embryo is now a Fetus
Week By Week Pregnancy Calendar
 Though the fetus is constantly moving, you will not be able to actually feel fetal movement for several more weeks. All of the organs, muscles, and nerves are in place and beginning to function. As the hands and feet develop fingers and toes, they have lost their paddle like look. The touch pads on the fingers form and already have fingerprints. During this week of pregnancy the crown to rump length of the fetus is 0. 9 inch to 1. 2 inches (22 to 30mm), weight 0. 07 ounce (2gm). They are now on the way to forming their testicles or ovaries, getting ready for the next generation. Until the ninth week of fetus development, the fetal reproductive apparatus is the same one for the both sexes.

Though the fetus is constantly moving, you will not be able to actually feel fetal movement for several more weeks. All of the organs, muscles, and nerves are in place and beginning to function. As the hands and feet develop fingers and toes, they have lost their paddle like look. The touch pads on the fingers form and already have fingerprints. During this week of pregnancy the crown to rump length of the fetus is 0. 9 inch to 1. 2 inches (22 to 30mm), weight 0. 07 ounce (2gm). They are now on the way to forming their testicles or ovaries, getting ready for the next generation. Until the ninth week of fetus development, the fetal reproductive apparatus is the same one for the both sexes.

 Body Changes During Pregnancy – Week By Week
Body Changes During Pregnancy – Week By Week
undefined
Physical Changes That Happen During Pregnancy
Bodily Changes in Pregnant Woman – Week By Week Analysis
Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
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Week 10
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Week 42
 During the first trimester of pregnancy, you may experience bleeding. [ Also Read: 8 Weeks Pregnant]
Week 9
At 9 weeks, the embryo will develop and as a result, you might feel pressure on your bladder. This could result in the leakage of urine. Around this week, the baby’s heart and eyelids will develop. His hair follicles and nipples will form too. Your baby will no longer be an embryo, he will be a foetus. The 9th week of pregnancy is a critical period for arm and leg development. Your little one’s liver, gall bladder, spleen and adrenal glands are also starting to develop. As the baby’s respiratory system develops, the baby’s ability to inhale or exhale amniotic fluid can cause hiccups, significant of good diaphragm development.

Body Changes During Pregnancy – Week By Week
Body Changes During Pregnancy – Week By Week
undefined
Physical Changes That Happen During Pregnancy
Bodily Changes in Pregnant Woman – Week By Week Analysis
Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11
Week 12
Week 13
Week 14
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Week 30
Week 31
Week 32
Week 33
Week 34
Week 35
Week 36
Week 37
Week 38
Week 39
Week 40
Week 41
Week 42

During the first trimester of pregnancy, you may experience bleeding. [ Also Read: 8 Weeks Pregnant]
Week 9
At 9 weeks, the embryo will develop and as a result, you might feel pressure on your bladder. This could result in the leakage of urine. Around this week, the baby’s heart and eyelids will develop. His hair follicles and nipples will form too. Your baby will no longer be an embryo, he will be a foetus. The 9th week of pregnancy is a critical period for arm and leg development. Your little one’s liver, gall bladder, spleen and adrenal glands are also starting to develop. As the baby’s respiratory system develops, the baby’s ability to inhale or exhale amniotic fluid can cause hiccups, significant of good diaphragm development.

Your Developing Baby, Week by Week | Parents Your Developing Baby, Week by Week
Your Developing Baby, Week by Week
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 Most impressive? At this point your baby's brain is developing at astounding rates -- nearly 250,000 neurons are forming every minute! The end of the embryonic stage also marks a turning point for development dangers -- your baby is much less susceptible to them now. Boy or Girl? Find out now. 10 of 42
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Week 11
Pregnancy week 11 female
Credit: Med ART Studios
Did you know your baby can breathe underwater? She's doing it right now. At weeks 10 and 11, the fetus will start to inhale and exhale small amounts of amniotic fluid, which helps your baby's lungs to grow and develop. Also this week, your baby's ears are scooting up to the sides of his head.

Most impressive? At this point your baby's brain is developing at astounding rates -- nearly 250,000 neurons are forming every minute! The end of the embryonic stage also marks a turning point for development dangers -- your baby is much less susceptible to them now. Boy or Girl? Find out now. 10 of 42
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Week 11
Pregnancy week 11 female
Credit: Med ART Studios
Did you know your baby can breathe underwater? She's doing it right now. At weeks 10 and 11, the fetus will start to inhale and exhale small amounts of amniotic fluid, which helps your baby's lungs to grow and develop. Also this week, your baby's ears are scooting up to the sides of his head.

Pregnancy week by week Pregnancy week by week
Pregnancy week by week
Weeks 1-2
Weeks 3-4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11
Week 12
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 These are the tubes between your ovaries and your uterus (womb). You may not know the exact day you get pregnant. This is why health care providers use your LMP to find out how far along you are in pregnancy. Weeks 3-4
The fertilized egg moves through the fallopian tubes towards your uterus and attaches to the lining of the uterus (called implantation). Once it's implanted, it begins to grow and the placenta forms. The placenta grows in the uterus and supplies your baby with food and oxygen through the umbilical cord. Week 5
Your baby's neural tube forms. The neural tube becomes your baby's brain, spinal cord and backbone. Tiny buds start to appear that become your baby's arms and legs. Your baby's heart and lungs are developing, and your baby's heart starts to beat.

Pregnancy week by week

These are the tubes between your ovaries and your uterus (womb). You may not know the exact day you get pregnant. This is why health care providers use your LMP to find out how far along you are in pregnancy. Weeks 3-4
The fertilized egg moves through the fallopian tubes towards your uterus and attaches to the lining of the uterus (called implantation). Once it's implanted, it begins to grow and the placenta forms. The placenta grows in the uterus and supplies your baby with food and oxygen through the umbilical cord. Week 5
Your baby's neural tube forms. The neural tube becomes your baby's brain, spinal cord and backbone. Tiny buds start to appear that become your baby's arms and legs. Your baby's heart and lungs are developing, and your baby's heart starts to beat.

Pregnancy week by week Pregnancy week by week
Pregnancy week by week
Weeks 1-2
Weeks 3-4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11
Week 12
Week 13
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 Week 10
Fingers and toes continue to develop and your baby's nails grow. You may be able to hear your baby's heartbeat at your prenatal care checkup. Week 11
Your baby's bones begin to get hard. Her skin is still thin and see-through but gets less see-through over time. Her head makes up about half of her size. Week 12
Your baby's hands develop faster than her feet. She moves around, but you may not be able to feel her move yet. She's about 2 inches long and weighs about ½ an ounce. Week 13
This is the start of your second trimester! Your baby's growing fast.

Pregnancy week by week

Week 10
Fingers and toes continue to develop and your baby's nails grow. You may be able to hear your baby's heartbeat at your prenatal care checkup. Week 11
Your baby's bones begin to get hard. Her skin is still thin and see-through but gets less see-through over time. Her head makes up about half of her size. Week 12
Your baby's hands develop faster than her feet. She moves around, but you may not be able to feel her move yet. She's about 2 inches long and weighs about ½ an ounce. Week 13
This is the start of your second trimester! Your baby's growing fast.

Pregnancy week by week Pregnancy week by week
Pregnancy week by week
Weeks 1-2
Weeks 3-4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11
Week 12
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 Your baby's genitals begin to form. Week 8
All of your baby's major organs and body systems are developing. The placenta is working. Week 9
Tiny buds appear that become your baby's teeth. Your baby is close to ½ an inch long now. Week 10
Fingers and toes continue to develop and your baby's nails grow. You may be able to hear your baby's heartbeat at your prenatal care checkup. Week 11
Your baby's bones begin to get hard. Her skin is still thin and see-through but gets less see-through over time. Her head makes up about half of her size.

Pregnancy week by week

Your baby's genitals begin to form. Week 8
All of your baby's major organs and body systems are developing. The placenta is working. Week 9
Tiny buds appear that become your baby's teeth. Your baby is close to ½ an inch long now. Week 10
Fingers and toes continue to develop and your baby's nails grow. You may be able to hear your baby's heartbeat at your prenatal care checkup. Week 11
Your baby's bones begin to get hard. Her skin is still thin and see-through but gets less see-through over time. Her head makes up about half of her size.

Your Developing Baby, Week by Week | Parents Your Developing Baby, Week by Week
Your Developing Baby, Week by Week
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 In the weeks to come, the mesoderm will also evolve into bones, muscles, kidneys and reproductive organs. 5 of 42
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Week 6
Pregnancy week 6
Credit: Med ART Studios
By the end of this week your baby will have tripled in size! His heart is now beating with a regular rhythm. It's still too faint to be picked up by your doctor's stethoscope, but if you have an ultrasound at some point over the next few weeks it will probably be visible as a tiny, pulsing dot in the middle of his mini body. Fun fact: From now until birth, your child's heart will beat about 150 times a minute -- twice the average adult rate. Also this week, your baby's brain hemispheres are forming -- and brain waves can now be recorded. 6 of 42
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Week 7
Pregnancy week 7
Credit: Med ART Studios
Your baby is already developing amazingly distinct facial features.

In the weeks to come, the mesoderm will also evolve into bones, muscles, kidneys and reproductive organs. 5 of 42
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Week 6
Pregnancy week 6
Credit: Med ART Studios
By the end of this week your baby will have tripled in size! His heart is now beating with a regular rhythm. It's still too faint to be picked up by your doctor's stethoscope, but if you have an ultrasound at some point over the next few weeks it will probably be visible as a tiny, pulsing dot in the middle of his mini body. Fun fact: From now until birth, your child's heart will beat about 150 times a minute -- twice the average adult rate. Also this week, your baby's brain hemispheres are forming -- and brain waves can now be recorded. 6 of 42
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Week 7
Pregnancy week 7
Credit: Med ART Studios
Your baby is already developing amazingly distinct facial features.

 Body Changes During Pregnancy – Week By Week
Body Changes During Pregnancy – Week By Week
undefined
Physical Changes That Happen During Pregnancy
Bodily Changes in Pregnant Woman – Week By Week Analysis
Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11
Week 12
Week 13
Week 14
Week 15
Week 16
Week 17
Week 18
Week 19
Week 20
Week 21
Week 22
Week 23
Week 24
Week 25
Week 26
Week 27
Week 28
Week 29
Week 30
Week 31
Week 32
Week 33
Week 34
Week 35
Week 36
Week 37
Week 38
Week 39
Week 40
Week 41
Week 42
 His hair follicles and nipples will form too. Your baby will no longer be an embryo, he will be a foetus. The 9th week of pregnancy is a critical period for arm and leg development. Your little one’s liver, gall bladder, spleen and adrenal glands are also starting to develop. As the baby’s respiratory system develops, the baby’s ability to inhale or exhale amniotic fluid can cause hiccups, significant of good diaphragm development. Though you won’t be able to actually feel fetal hiccups for a few more months. You may feel dehydrated – it is advised that drink plenty of water during this week since it’s considered the roughest patch in the pregnancy according to most doctors. [ Also Read: 9 Weeks Pregnant]
Week 10
By week 10, almost all of your baby’s vital organs will be fully developed and will start to function. Your baby will officially be called ‘foetus’.

His hair follicles and nipples will form too. Your baby will no longer be an embryo, he will be a foetus. The 9th week of pregnancy is a critical period for arm and leg development. Your little one’s liver, gall bladder, spleen and adrenal glands are also starting to develop. As the baby’s respiratory system develops, the baby’s ability to inhale or exhale amniotic fluid can cause hiccups, significant of good diaphragm development. Though you won’t be able to actually feel fetal hiccups for a few more months. You may feel dehydrated – it is advised that drink plenty of water during this week since it’s considered the roughest patch in the pregnancy according to most doctors. [ Also Read: 9 Weeks Pregnant]
Week 10
By week 10, almost all of your baby’s vital organs will be fully developed and will start to function. Your baby will officially be called ‘foetus’.

20 Amazing Facts About Baby Developing In The Womb | BabyGaga 20 Amazing Facts About Baby Developing In The Womb
20 Amazing Facts About Baby Developing In The Womb
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18 Embryo To Fetal Transformation Happens At Nine Weeks
17 Limbs Grow From Cell Buds
16 The Head Is Half The Baby Early On
15 The Fetus Is Ready At Six Months
14 Babies Cry With An Accent
13 The Fetus Arrives With 300 Bones
12 The Brain Organises Itself At Three Weeks
11 The Fetus Can Feel Touch
10 Fingerprints Occur At Ten Weeks
9 The Placenta Starts Working At Three Weeks
8 Learning Starts In The Womb
7 Kneecaps Don’t Develop Until After Birth
6 The Zygote Is Biologically Alive When...
5 It Takes Sixteen Weeks To Decide The Gender
4 Facial Features Are Recognisable At Four Weeks
3 Its A Hairy Fetus Inside
2 The Eyes Open Around Thirty Weeks
1 The Baby Is Ready When It Outgrows The Womb
 The fetal period begins at week 9 and has two main things going on. The first is rapid growth. The fetus increases 25-fold during the fetal stage in terms of cell size and number. This is most rapid at week 16. In fact, the fetus gains about 500 grams of weight in this time! The other amazing thing that happens is the tissue and organ differentiation. This is when the cluster of cell buds start sprouting out and forming the basis of the organs they are going to become. So little lung buds start getting ready to do the breathing and little limb buds start getting ready to become arms and legs. The fetal stage really is the beginning of a mini human getting ready for life which is amazing in itself. 17 Limbs Grow From Cell Buds
The first month of conception ends with a fully formed human embryo.

20 Amazing Facts About Baby Developing In The Womb | BabyGaga

20 Amazing Facts About Baby Developing In The Womb
20 Amazing Facts About Baby Developing In The Womb
20 The Heart Starts Beating At 18 Days
19 Fertilisation Is More Than Just An Egg
18 Embryo To Fetal Transformation Happens At Nine Weeks
17 Limbs Grow From Cell Buds
16 The Head Is Half The Baby Early On
15 The Fetus Is Ready At Six Months
14 Babies Cry With An Accent
13 The Fetus Arrives With 300 Bones
12 The Brain Organises Itself At Three Weeks
11 The Fetus Can Feel Touch
10 Fingerprints Occur At Ten Weeks
9 The Placenta Starts Working At Three Weeks
8 Learning Starts In The Womb
7 Kneecaps Don’t Develop Until After Birth
6 The Zygote Is Biologically Alive When...
5 It Takes Sixteen Weeks To Decide The Gender
4 Facial Features Are Recognisable At Four Weeks
3 Its A Hairy Fetus Inside
2 The Eyes Open Around Thirty Weeks
1 The Baby Is Ready When It Outgrows The Womb

The fetal period begins at week 9 and has two main things going on. The first is rapid growth. The fetus increases 25-fold during the fetal stage in terms of cell size and number. This is most rapid at week 16. In fact, the fetus gains about 500 grams of weight in this time! The other amazing thing that happens is the tissue and organ differentiation. This is when the cluster of cell buds start sprouting out and forming the basis of the organs they are going to become. So little lung buds start getting ready to do the breathing and little limb buds start getting ready to become arms and legs. The fetal stage really is the beginning of a mini human getting ready for life which is amazing in itself. 17 Limbs Grow From Cell Buds
The first month of conception ends with a fully formed human embryo.

 Body Changes During Pregnancy – Week By Week
Body Changes During Pregnancy – Week By Week
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Physical Changes That Happen During Pregnancy
Bodily Changes in Pregnant Woman – Week By Week Analysis
Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11
Week 12
Week 13
Week 14
Week 15
Week 16
Week 17
Week 18
Week 19
Week 20
Week 21
Week 22
Week 23
Week 24
Week 25
Week 26
Week 27
Week 28
Week 29
Week 30
Week 31
Week 32
Week 33
Week 34
Week 35
Week 36
Week 37
Week 38
Week 39
Week 40
Week 41
Week 42
 Though you won’t be able to actually feel fetal hiccups for a few more months. You may feel dehydrated – it is advised that drink plenty of water during this week since it’s considered the roughest patch in the pregnancy according to most doctors. [ Also Read: 9 Weeks Pregnant]
Week 10
By week 10, almost all of your baby’s vital organs will be fully developed and will start to function. Your baby will officially be called ‘foetus’. The baby’s cartilage and bones will keep forming and the genitals will form too. The eyes of the foetus will become more pronounced. The foetus will receive oxygen through the umbilical cords and occasional breathing movements may be noticed in the womb. [ Also Read: 10 Weeks Pregnant]
Week 11
By week 11, the foetus can breathe, suck its thumb, and sigh.

Though you won’t be able to actually feel fetal hiccups for a few more months. You may feel dehydrated – it is advised that drink plenty of water during this week since it’s considered the roughest patch in the pregnancy according to most doctors. [ Also Read: 9 Weeks Pregnant]
Week 10
By week 10, almost all of your baby’s vital organs will be fully developed and will start to function. Your baby will officially be called ‘foetus’. The baby’s cartilage and bones will keep forming and the genitals will form too. The eyes of the foetus will become more pronounced. The foetus will receive oxygen through the umbilical cords and occasional breathing movements may be noticed in the womb. [ Also Read: 10 Weeks Pregnant]
Week 11
By week 11, the foetus can breathe, suck its thumb, and sigh.

30 weeks pregnant: fetal development - BabyCenter Australia 30 weeks pregnant: fetal development
30 weeks pregnant: fetal development
Why is your back hurting?
An unanticipated problem was encountered, check back soon and try again
Track your baby’s development
 This page is designed to give you a general idea of how a fetus grows in the uterus. << 29 weeks
31 weeks >>
Last reviewed: November 2019
References
Carter BS. 2017. Polyhydramnios and oligohydramnios. Medscape. reference.medscape.com [Accessed April 2020]
Hill MA. 2019a. Fetal development. University of New South Wales, Embryology.

30 weeks pregnant: fetal development - BabyCenter Australia

30 weeks pregnant: fetal development
30 weeks pregnant: fetal development
Why is your back hurting?
An unanticipated problem was encountered, check back soon and try again
Track your baby’s development

This page is designed to give you a general idea of how a fetus grows in the uterus. << 29 weeks
31 weeks >>
Last reviewed: November 2019
References
Carter BS. 2017. Polyhydramnios and oligohydramnios. Medscape. reference.medscape.com [Accessed April 2020]
Hill MA. 2019a. Fetal development. University of New South Wales, Embryology.

Here's what happens during the twelfth week of pregnancy - lifealth Here’s what happens during the twelfth week of pregnancy
Here’s what happens during the twelfth week of pregnancy
During the twelfth week of pregnancy, the baby continues to grow rapidly – intestines are still developing but there's enough room for them to move in the abdominal area since the baby has grown considerably in size.
 Development of baby in the 12th week of pregnancy: The baby continues to grow rapidly – intestines are still developing but there’s enough room for them to move in the abdominal area since the baby has grown considerably in size. Nails on toes and fingers become visible, vocal cords also form during this week. Facial features like lips and eyebrows begin to take shape. Brain development continues as usual and the nerve cells start to multiply rather fast. The central nervous system also develops, which means muscles begin responding to the brain. As a result of this, the baby can now easily move wrists and arms, bend the elbow, clench and open fists. By week twelve, the uterus will start to bulge above the pubic bone. And between this week and the sixteenth week of pregnancy, your baby bump will begin to show properly. Pregnancy diet:

Here's what happens during the twelfth week of pregnancy - lifealth

Here’s what happens during the twelfth week of pregnancy
Here’s what happens during the twelfth week of pregnancy
During the twelfth week of pregnancy, the baby continues to grow rapidly – intestines are still developing but there's enough room for them to move in the abdominal area since the baby has grown considerably in size.

Development of baby in the 12th week of pregnancy: The baby continues to grow rapidly – intestines are still developing but there’s enough room for them to move in the abdominal area since the baby has grown considerably in size. Nails on toes and fingers become visible, vocal cords also form during this week. Facial features like lips and eyebrows begin to take shape. Brain development continues as usual and the nerve cells start to multiply rather fast. The central nervous system also develops, which means muscles begin responding to the brain. As a result of this, the baby can now easily move wrists and arms, bend the elbow, clench and open fists. By week twelve, the uterus will start to bulge above the pubic bone. And between this week and the sixteenth week of pregnancy, your baby bump will begin to show properly. Pregnancy diet: