What does the mucus plug look like?
The mucus plug is mucus that seals the cervical canal like a cork throughout pregnancy. Towards the end of pregnancy, as the cervix starts to shorten and open, the plug loosens and comes away. The British NHS calls this a show and treats it as a sign that the body is starting to prepare for birth.
- Texture: thick, sticky, jelly-like or stringy mucus, clearly thicker than everyday discharge.
- Colour: clear, milky white or slightly tinged with blood, pink, red or brown. Pacjent.gov.pl, the Polish patient portal, describes it as thick, slightly pink mucus.
- Amount: according to Cleveland Clinic, usually about 1-2 tablespoons, with a single piece about 2.5-5 cm long. The look and amount vary.
- How it comes away: in one piece or in several. Some women never notice it, because it comes away in the toilet or only during labour.
The plug can regenerate, so more mucus a few days later does not have to mean anything. Light pink or brown streaks are a small amount of blood, which Cleveland Clinic says is common. Blood that flows like a period is a different matter: we cover it below.
Does losing the mucus plug mean labour is starting?
Not straight away. The Polish standard of perinatal care (consolidated text, Dz.U. 2026 poz. 1140) says that the start of labour is recognised by contractions of the uterus that shorten and open the cervix. The plug is a forerunner of labour, not its start. Sources give different answers about how much time can pass:
| Source | When the plug comes away and what happens next |
|---|---|
| pacjent.gov.pl | it can appear a few days before labour |
| NHS: signs that labour has begun | just before labour or in early labour; labour may follow quickly or after a few days |
| NHS: vaginal discharge in pregnancy | usually in the last week or so of pregnancy, as pink streaks of jelly-like mucus |
| Cleveland Clinic | labour may start within hours or days, and sometimes only after a few weeks |
The conclusion is simple: nobody can predict when labour will start from the plug. An internal examination at the clinic and sex in the last weeks can loosen it, so losing the plug the day after a check-up does not have to mean labour is close. If you are past 37 weeks, have no contractions, your waters have not broken, you are not bleeding and your baby is moving as usual, you can stay at home and watch. How to recognise labour contractions and how far apart they should be before you go in is covered in our article on the signs of labour, and what happens to the cervix in each phase in our article on dilation.
Mucus plug or waters: how can you tell them apart?
| Feature | Mucus plug | Waters (amniotic fluid) | Everyday discharge |
|---|---|---|---|
| Texture | thick, jelly-like, stringy | watery fluid | thin |
| Colour | clear, milky white, pink or brown | clear and pale, may be slightly bloodstained at first | clear or milky white |
| Amount | usually a tablespoon or two, in one or several pieces | a sudden gush or a steady trickle | more than before pregnancy, but no leaking |
| What to do | watch, if there are no other symptoms | go to hospital, even without contractions | nothing, if there is no smell or itching |
Pacjent.gov.pl advises going to hospital when you notice fluid leaking, even if contractions have not started. The NHS admits it is sometimes hard to tell amniotic fluid from urine, so if you are not sure, treat the leak as your waters. In hospital a midwife or doctor will check with a speculum examination. NICE guidelines recommend it when it is uncertain whether the waters have broken, and advise against a digital examination while there are no contractions.
- Write down what time the leaking started.
- Wear a pad, not a tampon, so the colour and amount of fluid can be checked.
- Note the colour and smell. Green or brown waters may mean meconium, your baby's first poo, in the amniotic fluid. The standard lists meconium or blood in the amniotic fluid as a risk factor for complications, so with such waters or an unpleasant smell, go in straight away.
- If your group B streptococcus (GBS) swab was positive, say so as soon as you arrive. According to the RCOG, antibiotics then need to be given as soon as possible.
The approach in the UK differs from Poland. NICE recommends a phone assessment with a midwife first, and offers women without risk factors after 37 weeks a choice between induction straight away and waiting for up to about 24 hours. According to NICE, labour starts on its own within 24 hours in about 60% of women whose waters have broken. In Poland, follow the advice of pacjent.gov.pl and your hospital, and do not wait at home.
What discharge is normal in the third trimester?
You have more discharge in pregnancy, and even more towards the end. According to the NHS, healthy discharge is thin, clear or milky white and does not smell unpleasant. In the last week or so of pregnancy it may contain streaks of sticky, pink mucus, which is the plug. If you think your waters may have broken, use a pad, not a tampon, so the midwife can check the colour of the fluid.
Normal discharge does not burn or itch and does not suddenly change colour or smell. Any such change is a reason to tell your midwife or doctor rather than treat yourself.
Yellow discharge before labour: is it an infection?
It can be. The NHS advises contacting your midwife or doctor if your discharge:
- is yellow or green
- smells unpleasant or strange
- comes with itching, burning or soreness around the vagina
- comes with pain when you pee
These symptoms may mean a vaginal infection, for example thrush or a bacterial infection. Not all treatments for intimate infections are safe in pregnancy, so do not buy them yourself without talking to a doctor or midwife. According to the NHS, infection is one of the reasons a baby may be born early, so before 37 weeks do not put this conversation off.
Remember that you cannot detect group B streptococcus (GBS) from the colour of your discharge. According to the RCOG, 20-40% of women carry it in the vagina or rectum and most have no symptoms. That is why the standard provides for a vaginal and rectal swab between 35 and 37 weeks. What a positive result means is explained in our article on tests at the end of pregnancy.
Go to hospital urgently, without waiting for an appointment, if unpleasant-smelling discharge comes with a fever, a fast pulse or pain in the lower abdomen. The RCOG lists these as possible signs of infection, especially if your waters may have broken.
Brown discharge at 38 weeks and blood: when is it urgent?
Brown or pink-tinged mucus at the end of pregnancy is usually a small amount of blood mixed with the plug. It often appears after an internal examination or after sex, because in pregnancy the blood vessels of the cervix change and it is easily irritated. If it is only streaks in the mucus, you have no pain and your baby is moving as usual, you can watch.
Bleeding is different. The NHS advises contacting your midwife, doctor or hospital straight away for any vaginal bleeding in pregnancy, even if it is light. The Polish standard of perinatal care lists bleeding from the genital tract as a risk factor for complications, and causes can include placenta praevia or placental abruption.
- Go to hospital straight away: fresh red blood that flows like a period, clots, bleeding that does not ease, blood in your waters.
- Call 112: heavy bleeding that soaks a pad soon after you put it on, or bleeding with severe abdominal pain, dizziness or fainting.
Mucus plug, waters or bleeding before 37 weeks: what to do?
Before 37 weeks of pregnancy, treat any of these signs as urgent, because they may mean threatened preterm labour. Cleveland Clinic advises contacting your doctor if the plug comes away before 37 weeks, even without other symptoms. According to the NHS, go to hospital or call the maternity unit if before 37 weeks you have:
- regular contractions or tightenings
- period-type pains
- a gush or trickle of fluid from your vagina
- backache that is not usual for you
- vaginal bleeding
According to the RCOG, waters breaking before 37 weeks, before contractions start, happens in up to 3 in 100 pregnant women. The RCOG advises going to hospital straight away. There a doctor will check whether it is amniotic fluid and whether there is an infection, and will assess your baby, and what happens next depends on how many weeks pregnant you are.
How can a midwife help and when should you call her?
| What you notice | What to do |
|---|---|
| Jelly-like mucus, clear or with pink streaks, after 37 weeks, without contractions or bleeding | watch at home and mention it to your midwife or doctor at your next contact |
| Yellow or green discharge, unpleasant smell, itching, burning | call your midwife or the doctor looking after your pregnancy and book an appointment |
| Leaking fluid, even without contractions | go to hospital |
| Green, brown or foul-smelling waters, fresh blood, fewer baby movements, fever | go to hospital straight away |
| Heavy bleeding, bleeding with severe abdominal pain, dizziness or fainting | call 112 |
| Mucus plug, fluid, blood or contractions before 37 weeks | fluid, blood or contractions: go to hospital straight away; the plug alone: call the maternity unit or your doctor straight away |
Signs that labour is starting and emergencies that need quick admission to hospital are part of the antenatal education programme set out in the standard. From the time your pregnancy is confirmed until birth, you are entitled to free antenatal education with a primary care (POZ) midwife, funded by the NFZ, Poland's public health insurer. It is a good time to ask what the plug looks like, how to recognise your waters and which hospital to go to.
If you are unsure about your discharge, a midwife, including a private one during a home visit, can ask about your symptoms, assess you and your baby's heartbeat and tell you whether you need a doctor. Performing and interpreting a CTG in pregnancy is one of the guaranteed services of a POZ midwife, but not every midwife has the equipment, so ask in advance. If you suspect your waters have broken, are bleeding, have a fever or have symptoms before 37 weeks, do not wait for a visit or a call back: go to hospital. If worrying symptoms appear after the birth, see our article on when to call a midwife and when to go to hospital after giving birth.
