Most people lose their mucus plug sometime between 37 and 42 weeks of pregnancy, though the exact timing varies widely. It can happen several days before labor starts or right at the beginning of labor itself. Some people lose it weeks before delivery, while others don’t notice it at all.
Why It Happens When It Does
The mucus plug is a thick barrier that seals the opening of your cervix throughout pregnancy, protecting the baby from bacteria. As your body prepares for labor, your cervix starts to soften, thin out, and gradually open. That process pushes the plug out into the vagina. This is why timing is so variable: cervical changes can begin days or even weeks before contractions become regular and active labor kicks in.
For first pregnancies, the cervix often starts these changes slowly, so the plug may come out in small pieces over several days rather than all at once. In subsequent pregnancies, the cervix tends to dilate more quickly, and the plug is more likely to come out in one piece closer to active labor.
What It Looks Like
The mucus plug is about 1 to 2 inches long and roughly 1 to 2 tablespoons in volume. It’s stringy, sticky, and jelly-like in texture. Color ranges from clear to off-white, and it can have streaks of pink, brown, or red blood mixed in. Some people describe it as similar to a thick blob of nasal mucus. Others pass it gradually and mistake it for normal vaginal discharge, which increases in the third trimester anyway.
Mucus Plug vs. Bloody Show
These two terms get used interchangeably, but they’re slightly different. When blood from the cervix mixes with the mucus plug as it dislodges, that’s called a bloody show. The blood comes from tiny blood vessels in the cervix that break as it dilates. A bloody show can be red, brown, or pink and will still have that jelly-like, stringy texture, but with more noticeable blood throughout rather than just faint streaks.
A bloody show generally signals that labor is closer than a mucus plug on its own. If you see a plug that’s mostly clear or off-white with minimal blood, labor could still be days or even a couple of weeks away. A bloody show with more prominent blood mixed in tends to mean labor is within the next day or two, though this isn’t a hard rule.
Can It Regenerate?
Yes. If you lose the mucus plug earlier in pregnancy, your body can produce a new one. The cervical glands continue secreting mucus, and as long as the cervix hasn’t significantly dilated, a new plug can form. This is one reason losing it before 37 weeks doesn’t automatically mean preterm labor is imminent. That said, losing it well before 37 weeks, especially with other symptoms like regular contractions, pelvic pressure, or fluid leaking, is worth reporting to your provider since it can be a sign that the cervix is changing too early.
How Soon Labor Starts After Losing It
There’s no reliable countdown. For some people, labor starts within hours. For others, it’s a week or more. Losing the mucus plug confirms that your cervix is dilating, but early dilation can stall and restart. It’s one sign among many that your body is moving toward labor rather than a signal that delivery is imminent.
Other signs that labor is getting closer include regular contractions that increase in frequency and intensity, lower back pain that doesn’t go away with position changes, and your water breaking. If the mucus plug comes out alongside any of these, labor is more likely to be near. If it comes out on its own with no other symptoms, you’re probably still in the waiting phase.
What to Watch For
Normal mucus plug discharge is a small amount of jelly-like mucus, possibly with light streaks of blood. Bright red bleeding that soaks a pad, fluid that gushes or steadily leaks (which could be amniotic fluid), or losing the plug before 36 weeks alongside contractions are all reasons to contact your provider promptly. Heavy bleeding in particular can indicate a placental issue rather than normal cervical changes.
If you lose your plug at 37 weeks or later with no other symptoms, there’s generally nothing you need to do except keep an eye out for contractions and other labor signs over the coming days.