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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: والاختلافات التنموية التي تتوقف على الجنس تظهر للمرة الأولى. وعلى سبيل المثال، فإن الأجنة الأنثوية تظهر حركات فك أكثر تكراراً من الأجنة الذكرية.

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