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Does a fetus really grow a full coat of fur in the womb and maintain it for weeks?
Wonderingthinker
Yes it does.
About four months into a normal nine-month pregnancy, when the fetus is about 5.3 inches (135 mm) long and weighs about 6 ounces (170 g). Fine hair forms on the upper lip. Gradually, over the next month or so, this fine hair spreads to eventually cover the entire body! The unborn baby remains completely hairy for many weeks.
This soft, hairy coat is called lanugo. The word is from the Latin lan and means "wooly down". This hair suit is shed before or soon after birth. Each hair of the lanugo is shed one by one and is then swallowed by the baby. The tiny hairs join mucus, bile, and other products to form a black substance called meconium. Just after birth, this meconium is excreted by the newborn in its first bowel movement.
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∙ 10y ago
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