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Amniotic Sac

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."

By Healthwise Staff
Primary Medical Reviewer Sarah Marshall, MD - Family Medicine
Specialist Medical Reviewer William Gilbert, MD - Maternal and Fetal Medicine
Last Revised January 10, 2011

WebMD Medical Reference from Healthwise

Last Updated: January 10, 2011
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