The mucus plug is a protective layer made up of sticky mucus that seals the cervix (the opening of the uterus). The cervical canal produces this plug to protect your womb and unborn baby from bacteria ...

Your body knows how to keep your baby safe during pregnancy, starting with the mucus plug. Learn what the mucus plug is, what it does, and when you'll lose it. Medically reviewed by Alyssa Dweck, MS, ...

A mucus plug protects the cervix from bacteria during pregnancy. Losing a mucus plug can indicate the start of labor. Contact your doctor if you lose your mucus plug before 37 weeks. A mucus plug is a ...