An increase in vaginal discharge is one of the first physical changes of pregnancy and one of the least discussed. Higher oestrogen and increased blood flow to the cervix mean more of it, often from the first trimester and usually more again toward the end — and because nobody warns you, the natural reaction is to assume something is wrong.
Usually nothing is. This guide sets out what healthy pregnancy discharge actually looks like, walks through the colours one by one, explains how to tell discharge from amniotic fluid, and lists the changes that mean picking up the phone rather than waiting for your next appointment.
The short answer. Normal pregnancy discharge is thin, clear or milky white, and does not smell unpleasant. More of it is expected, and it increases further as pregnancy goes on — its job is to stop infection travelling up to the womb. Call your midwife if it turns green or yellow, smells strange, comes with itching, soreness or pain when you pee, or if there is any bleeding at all.
What Normal Looks Like
The clinical name is leukorrhoea, and the description is unglamorous: thin, clear to milky white, mild-smelling or odourless. It may leave a pale yellow mark when it dries on underwear, which is normal and not the same as yellow discharge.
Volume varies enormously between women and between weeks. There is no correct amount. What matters is a change from your normal — in colour, smell, or in the sensation that comes with it.
Colour by Colour
| What you see | Usually means | What to do |
|---|---|---|
| Clear or milky white, thin | Normal pregnancy discharge | Nothing |
| Thick, white, like cottage cheese, with itching | Thrush — common in pregnancy | Ask your midwife or pharmacist before treating |
| Grey, thin, with a fishy smell | Possible bacterial vaginosis | Call your midwife — it is treatable |
| Green or yellow | Possible infection | Call your midwife |
| Brown | Old blood, often after sex or an examination | Tell your midwife — it still counts as bleeding |
| Pink or red | Fresh blood | Contact your midwife or doctor immediately |
| Thick jelly, streaked pink or brown, late on | The mucus plug, or "show" | Normal near term — mention it |
| Watery, keeps coming, soaks a pad | Possibly amniotic fluid | Call — see the test below |
Discharge or Waters? The Pad Test
This is the distinction that sends most women to the phone, and there is a simple way to narrow it down at home.
Empty your bladder, put on a clean period pad and lie down for twenty to thirty minutes. Then stand up. Discharge stops. Amniotic fluid releases again and soaks the pad. Fluid that keeps coming is treated as waters until a midwife says otherwise — our guide to waters breaking covers what happens next and which colours need an immediate call.
Two other clues: amniotic fluid is watery rather than thick and is usually odourless or faintly sweet, while urine smells of urine and stops when you tense your pelvic floor.
Thrush and Bacterial Vaginosis
Both are more common in pregnancy, because the same hormonal changes that increase discharge also change the vaginal environment. Neither is a sign of poor hygiene, and both are treatable.
- Thrush — thick white discharge, itching, soreness, sometimes stinging when you pee. Common, and not dangerous to the baby.
- Bacterial vaginosis — thin grey discharge with a fishy smell, often without itching. Worth treating in pregnancy, so do not ignore it because it does not hurt.
Do not self-treat. Oral antifungal capsules are avoided in pregnancy and the usual choice is a pessary, sometimes without the applicator. Ask your midwife or pharmacist which is right at your stage rather than picking a box off the shelf.
What Actually Helps
Day to day
- Unscented panty liners, changed often
- Cotton underwear, and none overnight if you are comfortable
- Plain water to wash the outside only
- Wipe front to back
- No douching — it makes infection more likely, not less
- No scented soaps, wipes, bath products or vaginal deodorants
- No tampons in pregnancy
When to Call
Contact your midwife or doctor immediately if you have any vaginal bleeding at any stage of pregnancy, however light.
Call the same day if: discharge is green or yellow; it smells unpleasant or strange; you are itchy or sore; it hurts to pee; you have pain in your abdomen or lower back; you are under 37 weeks and have a sudden increase in watery discharge; or you have a fever.
Watery discharge before 37 weeks deserves its own mention. It can be the first sign of preterm rupture of the membranes, which is why it is checked rather than watched — the tightenings guide covers the other early signs that go with it.
At a Glance
More discharge is one of the expected changes of pregnancy, and thin, clear or milky white with no smell is the normal picture. Colour and smell are what matter: green, yellow or foul-smelling discharge needs a call, thick white with itching is usually thrush, and any bleeding at all is an immediate call. If it is watery and a fresh pad soaks again after lying down, treat it as your waters. Skip the douches and the scented products — they cause the problem they promise to fix.
Inside Baby Novum. The daily check-in and the encrypted private diary let you note a change on the day it happens, tagged by week — so the answer to "when did this start?" at your next appointment is a date rather than a guess.
Next: Water Breaking → · Symptom A–Z → · Second Trimester Guide →
Frequently Asked Questions
Is more discharge normal in pregnancy?
Yes, and it is one of the earliest changes. Healthy pregnancy discharge is thin, clear or milky white, and should not smell unpleasant. The increase is driven by higher oestrogen and more blood flow to the area, and it helps stop infection travelling up to the womb. It usually increases further toward the end of pregnancy.
What colour discharge is a problem in pregnancy?
Green or yellow discharge, or discharge that smells strange or unpleasant, suggests infection and needs a call to your midwife. Thick white discharge like cottage cheese with itching usually means thrush. Any bleeding, at any stage, means contacting your midwife or doctor straight away.
How do I tell discharge from amniotic fluid?
Discharge is thicker and stops; amniotic fluid is watery, keeps coming and soaks a fresh pad again. Put on a clean pad, lie down for twenty to thirty minutes and then stand up. If fluid releases again, treat it as your waters and call your midwife.
Is brown discharge normal during pregnancy?
Brown discharge is old blood rather than fresh, and small amounts are common after sex or an internal examination. It still counts as bleeding, so tell your midwife about it. Anything heavier than light staining, or brown discharge with pain, needs a same-day call.
What does the mucus plug look like?
Toward the end of pregnancy you may pass thick, jelly-like mucus, sometimes streaked with pink or brown blood. This is the "show" — the mucus plug coming away as the cervix softens. It can happen days or weeks before labour, so it is a sign rather than a starting gun.
Can I treat thrush myself while pregnant?
Do not start over-the-counter treatment without asking. Thrush is common in pregnancy and treatable, but oral antifungal capsules are avoided and pessaries are usually preferred, sometimes without the applicator. Your midwife or pharmacist will tell you which option is right for your stage.
Does discharge change before labour?
It often increases in the last weeks, and mucus-like discharge streaked with pink or brown blood suggests the cervix is changing. A sudden watery gush or persistent trickle is a different thing entirely — that is likely your waters, and it needs a phone call.
Should I use panty liners or douches?
Unscented liners are fine and change them often. Do not douche, and skip scented soaps, wipes and vaginal deodorants — they disturb the natural balance and make thrush and bacterial vaginosis more likely, not less. Plain water on the outside is enough.