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
![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)
Mucus plug – what is it and what does it look like? | Pregnancy, Worries and discomforts articles & support | NCT
![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
![Arrow points to cervical mucus plug. Scale bar: 1 cm. (B) Diagram of... | Download Scientific Diagram Arrow points to cervical mucus plug. Scale bar: 1 cm. (B) Diagram of... | Download Scientific Diagram](https://www.researchgate.net/publication/255737551/figure/fig1/AS:203136644980753@1425442958906/Arrow-points-to-cervical-mucus-plug-Scale-bar-1-cm-B-Diagram-of-the-cervical-mucus.png)
Arrow points to cervical mucus plug. Scale bar: 1 cm. (B) Diagram of... | Download Scientific Diagram
![A porous cervical mucus plug leads to preterm birth induced by experimental vaginal infection in mice - ScienceDirect A porous cervical mucus plug leads to preterm birth induced by experimental vaginal infection in mice - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S2589004222007970-fx1.jpg)