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The Endowment for Human Development
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: از هفته 21 تا 22 بعد از لقاح، ریه ھا توانایی نفس کشیدن ھوا را بدست می آورند. این را سن زیست پذیری قلمداد می کنند. زیرا كه بقاء در خارج از شکم مادر برای بعضی رویان ھا ممکن می شود.

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