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The Endowment for Human Development
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Age of Viability


5 months, 1 week

From The Biology of Prenatal Development.Buy Now

Script: Entre 21 et 22 semaines après la fertilisation, les poumons commencent à pouvoir respirer l'air. Ce moment est considéré constituer l'âge de viabilité, la survie à l'extérieur de l'utérus étant possible pour certains fœtus.

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