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, ...

During pregnancy, you’ll discover firsthand all the amazing things your body innately knows how to do to get baby-ready. An important player in all this prep work is the cervical os. Here’s what this ...