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The Endowment for Human Development
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Vernix Caseosa


4 months, 1 week

From The Biology of Prenatal Development.Buy Now

Script: A protective white substance, called vernix caseosa, now covers the fetus. Vernix protects the skin from the irritating effects of amniotic fluid.

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