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The Endowment for Human Development
The Endowment for Human Development
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Playlist: Heart in Action

Hand Plates and Cartilage

#027, Movie 1 of 9

7 weeks, 4 days

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often long before birth.

The developmental period before birth is increasingly understood as a time of preparation during which the developing human acquires the many structures, and practices the many skills, needed
From The Biology of Prenatal Development.Buy Now
    All ages referenced to fertilization, not last menstrual period.
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