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Cervix with Mucous Plug

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Last updated: Jul 8th, 2025
Cervix with Mucous Plug
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The cervix with a mucous plug prevents breakage of the amniotic sac or leakage of the vital amniotic fluid. The cervix is the lower one-third of the uterus; during pregnancy, a thick mucous plug seals the cervical orifice (the opening to the uterus).