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 ...

Mucus consists mainly of water and a gel-forming molecule called mucin. The body uses mucus to protect tissues, remove particles, and prevent infections. Mucus is essential for the functioning of many ...

Christopher Intagliata: One of the most crucial discoveries in 20th-century medicine may not have happened when it did if not for some snot on a petri dish. This is Christopher Intagliata, and you’re ...