You're perhaps in the final weeks of pregnancy and have heard that the mucus plug comes out before labor. But what exactly is a mucus plug, what does it look like, and does it mean labor is just around the corner?
Here is a thorough overview of everything you need to know about the mucus plug — based on guidance from leading obstetric organizations.
What Is the Mucus Plug?
The mucus plug is a thick, gel-like collection of mucus that sits in the cervix throughout pregnancy. It forms early in pregnancy and acts as a natural barrier, protecting the uterus and baby from bacteria and infections.
The mucus plug stays in place as long as the cervix is closed and firm. When the body begins to prepare for labor, the cervix softens and starts to open — and the mucus plug can come loose.
What Does the Mucus Plug Look Like?
Many pregnant women wonder if they have actually lost their mucus plug, or if it's just normal discharge. Here are the characteristics:
- Consistency — thick and gel-like, similar to mucus or jelly. Thicker and firmer than normal discharge
- Color — can range from clear and transparent to whitish, yellowish, greenish, or brownish
- Size — roughly 1–2 tablespoons, but it can come out as one clump or in several smaller pieces
- Blood tinges — it is normal to have pink or brown streaks of blood. This is called "bloody show"
The Difference Between the Mucus Plug and Normal Discharge
Discharge naturally increases during pregnancy. Here is how to tell the mucus plug apart from regular discharge:
| Mucus Plug | Normal Discharge |
|---|---|
| Thick, gel-like clump | Thinner, more liquid |
| May have blood streaks | Usually without blood |
| Comes out once or a few times | Steady, daily amount |
| Typically at the end of pregnancy | Throughout pregnancy |
Increased discharge during pregnancy is completely normal and caused by hormonal changes. As long as the discharge is clear or whitish and has no foul odor, there is nothing to worry about.
What Is Bloody Show?
Bloody show is the term used when the mucus plug comes out with blood mixed in. The pink or brownish blood comes from small blood vessels in the cervix that rupture as it begins to open.
Bloody show is one of the classic signs that labor is approaching, but it can still be hours, days, or even weeks before active labor begins.
When Does the Mucus Plug Come Out?
The mucus plug typically comes out during the last weeks before birth, usually between weeks 37 and 40. Some women lose it a few weeks before their due date, while others don't notice it at all.
Common times for the mucus plug to come out:
- A few weeks before labor — the cervix begins to ripen and dilate gradually
- Around the onset of contractions — many women lose their mucus plug after contractions have started
- After a pelvic exam — a vaginal examination can dislodge the mucus plug
- During active labor — some don't notice it until they are in active labor
It is common for the body to produce new mucus even after the mucus plug has come out. The cervix continues to produce mucus right up until birth, so losing the plug doesn't mean the protection is gone.
What Does It Mean When the Mucus Plug Comes Out?
Losing your mucus plug is a sign that your body is preparing for labor. The cervix has started to ripen — softening, shortening, and possibly beginning to dilate slightly.
But it does not necessarily mean labor is immediately around the corner:
- In first-time mothers, it can be days to weeks from when the mucus plug is lost until active labor starts
- In women who have given birth before, it may happen faster, but it varies from person to person
- The mucus plug alone is not a reliable indicator of exactly when labor will begin
Other Signs That Labor Is Approaching
The mucus plug is just one of several signs. Also watch for:
- Regular contractions that become stronger and closer together
- Water breaking — amniotic fluid releasing (a clear sign to head to the hospital)
- Downward pressure — the baby drops lower into the pelvis
- Loose stools — many women experience digestive changes just before labor
When Should You Contact the Hospital?
Losing your mucus plug is generally not a reason to contact the hospital in itself, as long as you are past week 37. But you should call your labor and delivery unit if:
- You are before week 37 — losing the mucus plug with blood or mucus before 37 weeks can be a sign of preterm labor
- You have a lot of bright red bleeding — a little pink or brown is normal, but larger amounts of bright red blood require evaluation
- Your water breaks — clear or yellowish fluid that flows uncontrollably
- You have regular contractions — contractions coming every 5 minutes and lasting at least one hour (use the 5-1-1 rule)
- The mucus plug has a foul odor — can indicate infection
If you are bleeding heavily (like a menstrual period or more) during pregnancy, always contact the hospital immediately. Heavy bleeding can be caused by placental abruption or placenta previa, which require emergency care.
Can the Mucus Plug Come Back?
Yes. The body can produce new mucus and "regenerate" the mucus plug after it has come out. This is one of the reasons there can be time between losing the mucus plug and actual labor. The cervix continues to protect itself until labor is underway.
Should You Do Anything Special?
When your mucus plug has come out, you generally don't need to do anything special:
- Use a pad if you experience discharge or blood-tinged mucus
- Avoid tampons — never use a tampon during pregnancy
- Bathe and shower as normal — it is safe to bathe even after the mucus plug has come out
- Observe — take note of the color and amount of any bleeding
- Prepare — check that your hospital bag is packed and that you know how to get to the labor and delivery unit
Frequently Asked Questions
Does Everyone Notice Losing Their Mucus Plug?
No. Many women don't realize they have lost their mucus plug, because it can come out gradually in small pieces — or disappear in the toilet without being noticed. This is completely normal.
Is It Dangerous to Lose the Mucus Plug Early?
Losing the mucus plug before week 37 can be a sign that the cervix is dilating too early. Contact your midwife or hospital for evaluation. The body can produce new mucus, however, and it doesn't necessarily mean labor is imminent.
Can Sex Cause the Mucus Plug to Come Out?
Yes, sex can contribute to the mucus plug coming out, particularly late in pregnancy. This is harmless, but can be surprising. If you are past week 37 and your pregnancy is uncomplicated, there is nothing to worry about.
What Is the Difference Between the Mucus Plug and the Water Breaking?
Amniotic fluid is thin and watery — it often flows as a steady stream or in gushes, and you cannot stop it. The mucus plug is thicker and gel-like. If you are unsure whether it is amniotic fluid, you should contact the hospital.
Are you tracking your pregnancy week by week? Use a contraction timer when contractions begin. Also check a hospital bag checklist so you are ready when the time comes.
See Also
- 5-1-1 Rule — When to Go to the Hospital
- The Placenta — Function and Importance
- Fear of Childbirth
- Signs of Labor — What to Expect
Sources
- American College of Obstetricians and Gynecologists (ACOG). "How to Tell When Labor Begins." acog.org
- Mayo Clinic. "Signs of labor: Know what to expect." mayoclinic.org
- What to Expect. "Losing Your Mucus Plug During Pregnancy." whattoexpect.com