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The Endowment for Human Development
The Endowment for Human Development
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Gender Differences


3 months, 2 weeks

From The Biology of Prenatal Development.Buy Now

Script: Les différences de développement basées sur le sexe apparaissent pour la première fois. Par exemple, les fœtus féminins démontrent des mouvements de mâchoires plus fréquemment que les fœtus masculins.

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
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