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Amniotic sac

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By Jeannette Curtis; Caroline Rea, RN, BS, MS

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The amniotic sac, or amnion, is a lining (membrane) inside the uterus that contains the fetus and the fluid that cushions the fetus (amniotic fluid). The amniotic sac is also called the “bag of waters.”

Author:Jeannette Curtis
Caroline Rea, RN, BS, MS
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Last Updated: 05/25/2007
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