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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: Por primera vez aparecen diferencias en el desarrollo que dependen del sexo. Por ejemplo, los fetos mujeres mueven la mandíbula con mayor frecuencia que los varones.

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