Belle Vue's Cambridge Hospital - Losing a mucus plug during pregnancy can be a precursor to childbirth. As the cervix begins to open wider in preparation for delivery, the mucus plug is
Dr. Madhuri Laha - The mucus plug is created once fertilization of an egg occurs. The mucus seals the cervix with what is called the mucus plug. This will protect the fetus
![All4Birth on X: "The appearance of your operculum, mucus plug or 'show' in your underwear is an indicator of cervical change, specifically cervical dilatation. Your mucus plug builds up in your cervix All4Birth on X: "The appearance of your operculum, mucus plug or 'show' in your underwear is an indicator of cervical change, specifically cervical dilatation. Your mucus plug builds up in your cervix](https://pbs.twimg.com/media/FFg4tqCWUAQiCiW.jpg)