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The Endowment for Human Development
The Endowment for Human Development
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Upper and Lower Limbs


3 months

From The Biology of Prenatal Development.Buy Now

Script: A las 12 semanas, el largo de las extremidades superiores casi ha alcanzado su proporción final respecto al tamaño corporal. Las extremidades inferiores tardan más en alcanzar sus proporciones finales.

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