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However, you can know the stages of the birth process and what to generally expect. Childbirth usually occurs in three stages: First stage: The time of the onset of true labor until the cervix is completely dilated to 10 cm. Second stage: The period after the cervix is dilated to 10 cm until the baby is delivered.
Conception is also the beginning of the germinal period of prenatal development. This stage occurs during the first 2 weeks of development (or the 2nd - 4th weeks of pregnancy). The union of the sperm and egg cell forms a single cell called a zygote. The zygote moves along the Fallopian tube toward the uterus.