During pregnancy, a protective barrier forms in the cervical canal, known as the mucus plug. This collection of thick mucus acts as a seal, helping to prevent bacteria and other potential sources of infection from entering the uterus and reaching the developing fetus.
The Appearance of the Mucus Plug
The mucus plug can have varied appearances. It is often described as clear, off-white, or yellowish in color. Sometimes, it may appear pink, brown, or tinged with red blood.
The consistency of the mucus plug is usually thick, sticky, and gel-like, resembling jelly or snot. It can be stringy and may come out as one large glob or in several smaller pieces over time, making it potentially unnoticeable for some individuals. The size can vary, but it is generally about 1 to 2 inches in length, or approximately 1 to 2 tablespoons in volume. Variations in color, consistency, and size are common and usually do not indicate a problem.
Timing and What Losing Your Mucus Plug Signifies
Losing the mucus plug is a sign that the body is beginning to prepare for labor, but it does not necessarily mean labor is imminent. Many individuals lose their mucus plug days or even weeks before labor actually begins. Some may not notice it until they are already in active labor. Its dislodgement occurs as the cervix starts to soften, thin (efface), or open (dilate) in preparation for childbirth.
While losing the mucus plug indicates cervical changes, it is distinct from active labor. It signals cervical ripening, a process that can take time. The presence of blood in the mucus plug, sometimes referred to as “bloody show,” indicates that small blood vessels in the cervix have broken as it expands. However, losing the plug alone, without other signs like regular contractions or water breaking, does not mean active labor has started.
When to Contact Your Healthcare Provider
While losing the mucus plug is a normal part of late pregnancy, certain observations warrant contacting a healthcare provider. If the mucus plug is lost before 37 weeks of pregnancy, it is advisable to inform your provider, as this could be a sign of preterm labor.
It is important to contact a healthcare provider immediately if there is significant bright red bleeding, especially if it is more than just streaks or spotting. Heavy bleeding could indicate a more serious complication, such as placental abruption or placenta previa. Additionally, if the discharge has a foul odor or appears green, it could signal an infection, which requires prompt medical attention. A sudden gush or continuous leak of clear fluid also warrants immediate contact, as this may indicate the waters have broken. For typical mucus plug loss without these concerning symptoms, simply mentioning it at your next scheduled appointment is often sufficient.