The mucus plug consists of a collection of mucus that forms within the cervical canal. Its primary function is to create a sealed barrier, preventing bacteria and other potential sources of infection from entering the uterus and reaching the baby.
When It Typically Releases
The release of the mucus plug is a common occurrence in late pregnancy, signaling that the body is beginning its preparations for labor. Its timing varies, occurring weeks, days, or hours before labor, or even during active labor. Most commonly, it dislodges sometime after the 37th week of pregnancy.
This expulsion is a result of physiological changes happening in the cervix. As the body nears labor, the cervix starts to soften, thin (effacement), and gradually open (dilate). These changes cause the mucus plug, which has been sealing the cervical opening, to loosen and detach. While its release indicates cervical changes are underway, it does not provide a precise timeline for when labor will commence.
What to Look For
When expelled, the mucus plug’s appearance varies but is distinct from typical vaginal discharge. It is often described as thick, gelatinous, sticky, or jelly-like in texture. The volume can range from about one to two tablespoons, and it is usually odorless.
The color of the mucus plug can also differ; it may be clear, off-white, or yellowish. Sometimes, it can appear pink, brown, or streaked with a small amount of red blood. This slight blood tinge is normal and occurs as tiny blood vessels in the cervix may rupture when it begins to soften and dilate. It might come out as a single glob or in smaller pieces over a period of time.
What Its Release Means for Labor and Next Steps
The mucus plug’s release signals the body’s preparation for childbirth, but does not mean labor is imminent. For some, labor may begin within hours or days, while for others, it could still be weeks away. The presence of a small amount of blood mixed with the mucus plug is often referred to as “bloody show,” and this can indicate further cervical changes.
After noticing the mucus plug, it is helpful to observe for other signs of labor, such as regular contractions or the breaking of your water. Remaining calm is important, as its release is a normal part of the process. You should contact a healthcare provider if there is heavy bleeding, a continuous gush of fluid, or strong, regular contractions. If the mucus plug is released before 37 weeks of pregnancy, it is advisable to inform your healthcare provider.