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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: 12주까지는 팔의 길이가 몸 크기에 비례해 최종적으로 균형 잡힌 길이에 도달한다 다리는 최종적으로 균형 잡힌 길이에 도달하는데 더 많은 시간이 걸린다

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