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21 to 24 Weeks
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A protective waxy substance called Vernix covers the skin. By birth, most of the vernix will be gone but any that is left is quickly absorbed. Fetus has a hand and startle reflex. Footprints and fingerprints are forming. Fetus practices breathing by inhaling amniotic fluid into its developing lungs.
Courtesy of the Westside Pregnancy Resource Center
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