When the amniotic sac breaks - vpl_0545_001 The home for a developing fetus is the amniotic sac. E...
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When the amniotic sac breaks - vpl_0545_001 The home for a developing fetus is the amniotic sac. Entering the birth canal requires leaving the sac. The sac membrane breaks and the amniotic fluid that filled it - about a quart by the final week of pregnancy - flows out of the vagina. The amniotic sac membrane is thought to help protect the baby's head during labor, against the opening cervix. Sometimes the sac membrane breaks naturally; when a woman's so-called ``water breaks,'' and sometimes the sac is ruptured by the birth attendant.
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