This site is like KidSpiration, but it is free and easy to use. elements story, create-your-own-topic. Source: Liz Phillips. After a teacher types in the story starter, students log in to write. read, the class decides which direction the story should take. class agrees the story is finished.
Fetal development - month 1. First trimester. At the end of four weeks: Baby is 1/4 inch long. Heart, digestive system, backbone and spinal cord begin to form. Placenta (sometimes called afterbirth) begins to develop. The single fertilized egg is now 10,000 times larger than it was at conception.
Your baby is now about 13 centimeters (5.5 inches) long and weighs 140 grams (5 ounces). His skeleton is starting to harden from rubbery cartilage to bone.our baby is almost due. At birth, the average baby is more than 51 centimeters (20.5 inches) long from head to toe and weighs approximately 3.4 kilograms (7.5 pounds), but babies vary widely in size at this stage.