What is the purpose of the mucous plug?

Answer by  LauraLS (195)

The mucous plug is in the cervix, and prevents bacteria and other harmful factors in the environment from entering the uterus. The mucous plug starts to fall out as the cervix dilates prior to labor. Some women lose it during active labor, and some women start to lose it a couple weeks beforehand.

Answer by  livingchoice (84)

An accumulation of secretions that forms a barrier at the opening of the uterus to protect your baby from infection from the outside world.