By Grace Gallagher, Jan 9, 2023

In some cases it may even be reddish or bloody, Kecia Gaither, a double board-certified in OB/GYN, tells Romper. Simply put, the mucus plug protects the uterus from outside bacteria. “Functionally, one can think of it as a ‘cork,’ [a] barrier which along with the amniotic fluid protects the baby from the external world,” Gaither says. If the cork analogy ruins wine for you (apologies) you can also think of the mucus plug as a gatekeeper or a door that keeps out unwanted bacteria and germs.

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