Mucus Plug in Pregnancy: What It Is and What Comes Next
Medically Reviewed by Dr. Pedro Yelamo Vera, MD
Licensed Physician No. 484814280 · Official Medical College of Bizkaia (Spain)Last reviewed: 31 October 2026
Losing your mucus plug in pregnancy: what the show looks like, how it differs from labour or waters breaking, and the signs that need a call or 112.
You don't have to figure this out alone
Dr. Pedro Yelamo Vera is an independent, bilingual GP licensed in Spain. Book a 15-minute video consultation in English or Spanish for €50, with a private electronic prescription issued under Spanish law when clinically appropriate.
The mucus plug is a thick, jelly-like blob of mucus that sits in the neck of the womb (the cervix) in pregnancy. Losing it is called a "show". It is often pink or streaked with a little blood. It means the cervix is starting to open. Labour may follow in hours or days, so a show on its own is not an emergency.
- A show is sticky, jelly-like mucus, often pink. It can come out in one piece or in bits.
- It means the cervix is getting ready. Labour may start soon or take a few days. Some people never notice one.
- Real labour means regular contractions that get longer, stronger and closer together.
- Call your maternity unit now if your waters break, you bleed, your baby moves less, or you are under 37 weeks and think labour has started.
- Call 112 for heavy bleeding, bleeding with severe pain or fainting, or a strong urge to push.
Dr. Pedro Yelamo Vera is a GP licensed in Spain (Colegiado No. 484814280).
For a medical emergency, call 112 or go to the nearest local emergency department. Do not wait for a video consultation or an online reply.
What is the mucus plug?
During pregnancy, a plug of mucus closes the cervix. Near the end of pregnancy, the cervix softens and starts to open. The plug then comes away. In the UK this is called a show. In Spain it is the tapón mucoso, and losing it is expulsar el tapón mucoso.
What does a mucus plug look like?
The NHS describes it as sticky, jelly-like and pink. It may come out in one piece or in several smaller pieces. The pink colour comes from a small amount of blood. A Spanish regional health guide (Junta de Castilla y León) describes it as a blood-tinged discharge that is thicker than in the days before.
A little blood in the mucus is normal. Bleeding that looks like a period is not. More on that below.
Does losing the mucus plug mean labour is starting?
Not on its own. It is a sign that things are moving. The NHS says the show can come just before labour or early in labour. Labour may follow quickly, or it may take a few days. Some people never have a show at all, and their labour starts in other ways.
The signs that labour has truly begun are:
- Regular contractions that become longer, stronger and more frequent. They can feel like strong period pain.
- Your waters breaking, as a slow trickle or a sudden gush.
- Backache or an ache that comes and goes with the tightenings.
Practice tightenings (Braxton Hicks) are different. They are usually painless, short and irregular. They do not build up. The Castilla y León guide adds that early tightenings are often worse in the evening and at night and ease with rest.
What should I do when I lose my mucus plug?
If you are 37 weeks or more, feel well, have no bleeding and your baby is moving as usual, you can usually stay at home. Keep a pad on, not a tampon, so you can see any fluid or blood. Move around, drink and have a snack if you feel like it. Note the time and what you saw.
Then watch for the signs of labour. The NHS advises calling your midwife or maternity unit when contractions are regular and come every 5 minutes or more often. The Castilla y León guide gives the same figure, or every 8 to 10 minutes if you have given birth before. Call too if you are worried about anything.
If you are under 37 weeks, call your maternity unit or midwife for advice, even if you feel fine. They may want to check you.
Not sure whether what you are seeing is normal?
For questions that are not urgent, you can book a video visit with a GP licensed in Spain, in English or Spanish. He explains what is normal and where to go in Spain if you need to be seen. Signs of labour go straight to your maternity unit.
Is it my mucus plug or my waters breaking?
The plug is thick and jelly-like. Waters (amniotic fluid) are thin and watery. The NHS says the fluid is clear and pale. It may be slightly bloodstained at first. It can be hard to tell apart from urine.
If you think your waters have broken, call your maternity unit now, at any hour. Tell them at once if the fluid is green, brown or smelly. Most labours start within 24 hours of the waters breaking. If yours does not, you will usually be offered an induction, because of a small risk of infection. In Spain this is romper aguas or rotura de bolsa.
When should I go to the hospital?
Call your maternity unit or go to the hospital now, day or night, if:
- Your waters break, with or without contractions.
- You have vaginal bleeding. The Castilla y León guide says bleeding like a normal period or heavier needs the hospital.
- Your baby is moving less than usual, or you cannot feel movements.
- You are under 37 weeks and have regular tightenings, period-type pains, a gush or trickle of fluid, or unusual backache.
- A contraction lasts longer than 2 minutes, or you have 6 or more in 10 minutes.
- Your contractions are regular, every 5 minutes or more often.
In Spain, go to the maternity emergency service of your hospital: urgencias de maternidad or urgencias obstétricas. Bring your pregnancy record and ID.
When should I call 112?
Call 112 for an ambulance if you are pregnant and:
- You have heavy bleeding that soaks a pad soon after you put it on.
- You are bleeding and have severe tummy pain, shoulder pain, or feel faint or dizzy.
- You feel a strong urge to push and think the baby is coming now.
These are the NHS 999 signs. In Spain the number is 112.
Talking it through with a doctor by video
Dr. Yelamo is a GP licensed in Spain. He sees adults, children and pregnant patients by video, every day from 07:30 to 20:30 (Spain time). He does not replace your midwife (matrona) or your maternity unit. In a visit he can:
- Listen to what is worrying you and explain what is normal at your stage.
- Tell you clearly when you need to be seen in person, and where.
- Help with other pregnancy questions, such as medicines, nausea or a urine infection.
- Explain Spanish terms you may hear at the hospital.
He does not promise any test or prescription before the visit. Where clinically appropriate, following a genuine evaluation. Treatment and prescriptions are issued solely at the doctor's discretion based on evidence-based clinical guidelines.
A prescription is never guaranteed: it is issued only where clinically appropriate after a genuine evaluation, as a private electronic prescription under Spanish law. This service is for urgent, non-emergency care. In an emergency, call 112.
See how the Urgent Care video visit works. It lasts 15 minutes and costs €50.
This guide is general information. It does not replace a consultation with your doctor, midwife or maternity unit.
Frequently asked questions
What does a mucus plug look like?
It is sticky, jelly-like mucus. It is often pink or streaked with a little blood. It can come out in one piece or in several bits.
Does losing the mucus plug mean labour is starting?
Not always. It means the cervix is getting ready. Labour may start within hours or days. Regular contractions or your waters breaking are the real signs.
How long after losing the mucus plug does labour start?
It varies. The NHS says labour may follow quickly or take a few days. Some people never notice a show at all.
Do I need to go to hospital after losing my mucus plug?
Not if it is the only sign, you are 37 weeks or more, there is no bleeding and your baby moves as usual. Go if your waters break, you bleed or your baby moves less.
What if I lose my mucus plug before 37 weeks?
Call your maternity unit or midwife for advice. Go in now if you also have tightenings, period-type pains, fluid leaking or bleeding.
Is blood with the mucus plug normal?
A few streaks of blood are normal. Bleeding like a period, or heavier, is not. Go to the maternity unit, or call 112 if it is heavy or you feel faint.
What is the tapón mucoso?
It is the Spanish name for the mucus plug. Waters breaking is romper aguas, and the maternity emergency service is urgencias de maternidad.
Sources
- NHS: Signs that labour has begun
- NHS: Vaginal bleeding in pregnancy
- NHS: Premature labour and birth
- Junta de Castilla y León: Birth chapter of the maternal and child health guide (in Spanish)
Related guides
Medical Citations & Sources
This content is written and reviewed by a licensed physician with reference to the following official health authorities.
