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The Endowment for Human Development
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Upper and Lower Limbs


3 months

From The Biology of Prenatal Development.Buy Now

Script: تا هفته 12، طول اعضاء بالایی تقریبا به نسیت نهایی با سايز بدن رسیده است. اعضای زیرین در رسیدن به تناسب ھای نھایی خود نسبتا وقت زیادی را می گیرند.

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