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The Endowment for Human Development
The Endowment for Human Development
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Fetal Period Begins


9 weeks

From The Biology of Prenatal Development.Buy Now

Script: The fetal period continues until birth.

All ages referenced to fertilization, not last menstrual period.
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Breathing Motions
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4D Ultrasound
Fetal Period Begins
Fetal Period Begins
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