Pregnancy glossary

Mucus plug

Also called: Cervical plug

A thick collection of mucus that seals the cervical canal throughout pregnancy to protect your baby from bacteria.

When it comes up: Between weeks 37 and 40

As your cervix begins to thin and dilate in preparation for labor, this plug is discharged. It may come out all at once or gradually over days, appearing as a thick jelly-like discharge that might be tinged with brown or pink.

Losing the plug is a sign that your body is getting ready for childbirth, but actual labor could still take days or even weeks to begin.

Read more in the Nawah guide →

This guide is general information, not medical advice. It does not replace a doctor, and it knows nothing about your particular pregnancy. If something feels wrong, contact your doctor instead of waiting for the next scheduled visit.