Vaginal Discharge in Pregnancy: What Is Normal

What is actually happening

Almost everyone notices more discharge in pregnancy, and it keeps increasing. The NHS describes the healthy version precisely: "Healthy vaginal discharge is usually thin, clear or milky white, and should not smell unpleasant." It also notes that "towards the end of pregnancy, the amount of discharge increases further".

The HSE describes the same thing slightly differently — clear or white, "sticky or slippery and wet", possibly with a mild smell but not an unpleasant one, and often thicker and more gel-like as you approach the end. Tommy's uses almost identical wording: thin, clear or milky white, and it "does not smell bad".

NICE's antenatal care guideline treats this as a routine part of pregnancy information, advising clinicians to tell pregnant women "that this is common during pregnancy" — with a specific caveat we will come to.

You may go through several pairs of underwear a day, or start using liners. That on its own is not a sign of anything.

What normal looks like at different stages

Through most of pregnancy

Thin to creamy, clear to milky white, no strong smell, no itching, no soreness. The volume increases gradually.

In the last few weeks — the show

The NHS explains that as the cervix starts to open, the plug of mucus that has been sealing it comes away, and discharge may contain "streaks of sticky, jelly-like pink mucus". This is called a show. The HSE describes it as thick discharge streaked with pink jelly-like material, and a sign that your body is preparing for labour. You may have more than one show before labour actually begins, and a show is not itself an emergency.

What is not normal

NICE sets the threshold in a single sentence that is worth reading twice: pregnant women should be advised that discharge is common, "but if it is accompanied by symptoms such as itching, soreness, an unpleasant smell or pain on passing urine, there may be an infection that needs to be investigated and treated."

The NHS asks you to call your midwife if the discharge smells unpleasant or strange, is green or yellow, or if you have itching or soreness around your vagina, or pain when you pee. The HSE adds brown discharge, and links each pattern to a likely cause: an unpleasant or unusual smell suggesting bacterial vaginosis, itching suggesting thrush, pain on passing urine or blood in urine suggesting a urinary tract infection.

Tommy's adds two more: discharge that becomes watery, and discharge accompanied by vaginal bleeding.

The reason these matter is that they are treatable, not that they are usually dangerous. An infection identified in a five-minute appointment is a very different thing from an infection left for six weeks.

When to call someone

• Contact your maternity unit straight away if you are leaking or gushing clear or pinkish fluid before 37 weeks — this can mean your waters have broken early (Tommy's).
• Contact your maternity unit straight away if the fluid is green, brown or tinged with blood, at any stage (Tommy's).
• Contact your maternity unit if you are leaking or gushing fluid after 37 weeks — this may be labour starting (Tommy's).
• Contact your midwife or doctor urgently for any vaginal bleeding in pregnancy (NHS).
• Call your midwife or GP if discharge smells bad, changes colour to green, yellow or brown, or comes with itching, soreness or pain when you pee (NHS, HSE, NICE).
• Call your local emergency number (999 in the UK and Ireland, 911 in the US and Canada, 000 in Australia, or 111 in New Zealand) if you have heavy bleeding with severe pain or you feel faint.

The HSE's framing is the one to take away: contact your GP, midwife or obstetrician with any concerning symptom rather than waiting for a routine appointment.

What actually helps

If it is normal discharge: nothing, and that is the point

The HSE's practical list is mostly about not making things worse. Wash with water or an aqueous cream, wipe from front to back, wear cotton underwear, and pat dry. Do not douche, do not use tampons, and do not use scented products.

That last group is not fussiness. Douching and perfumed washes disturb the balance of bacteria in the vagina, which is the mechanism behind bacterial vaginosis in the first place — and the "solution" being sold for the smell is often the thing that caused it.

If there is an infection: it depends which one

NICE is specific about the two most common. For vaginal thrush, "offer vaginal imidazole (such as clotrimazole or econazole)". For bacterial vaginosis, "consider oral or vaginal antibiotics". They are different organisms with different treatments, which is exactly why buying a thrush pessary on the way home from work is a coin flip rather than a plan.

Bacterial vaginosis is worth understanding on its own terms. The NHS describes the main symptom as "an unusual vaginal discharge that has a strong fishy smell, particularly after sex", with discharge that becomes "greyish-white, thin and watery" — and notes that half of women with BV have no symptoms at all, and that itching and soreness are typically absent. On pregnancy it is measured: "If you develop bacterial vaginosis in pregnancy, there's a small chance of complications, such as premature birth or miscarriage", while adding that BV "causes no problems in the majority of pregnancies".

If there is doubt: ask for a swab

NICE advises clinicians to "consider carrying out a vaginal swab for pregnant women with symptomatic vaginal discharge if there is doubt about the cause", and to arrange appropriate investigations if a sexually transmitted infection is suspected. If you have been told it is thrush, treated it, and nothing has changed, a swab is a reasonable thing to ask for.

The short version

More discharge is expected; thin, clear or milky white and not smelly is normal; and a pink jelly-like show near the end is your cervix doing its job. Smell, colour, itching, soreness, pain on peeing, bleeding or a watery gush are the six things that get a phone call — and before 37 weeks, a gush gets that call today.