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
![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)
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
![Mucus plug – what is it and what does it look like? | Pregnancy, Worries and discomforts articles & support | NCT Mucus plug – what is it and what does it look like? | Pregnancy, Worries and discomforts articles & support | NCT](https://www.nct.org.uk/sites/default/files/styles/article_image_lg/public/2018-12/Mucus%20plug.jpeg?itok=pbd9Vmt4)