Pregnancy discharge is typically thin, clear or white, and mild-smelling. Most pregnant people notice a significant increase in discharge starting in the first trimester, and this is completely normal. The medical term for it is leukorrhea, and it serves a protective role, helping keep the birth canal free of harmful bacteria.
Why Discharge Increases During Pregnancy
Your body ramps up production of the hormone progesterone during pregnancy. Among other effects, progesterone stimulates the cervix to produce much more cervical mucus than usual. This surge is responsible for the noticeably heavier discharge that can catch many people off guard early in pregnancy.
The increased mucus isn’t a malfunction. It forms a barrier that helps protect the uterus from infection. You can think of it as one of the body’s built-in safety features for pregnancy.
What Normal Discharge Looks and Feels Like
Healthy pregnancy discharge is thin, clear or milky white, and has only a faint smell or no smell at all. It tends to be slippery or slightly sticky. The volume varies from person to person, but most people find they need a panty liner at some point, especially as pregnancy progresses. You may notice it on your underwear as a whitish or slightly yellowish spot once it dries.
The amount generally increases as the weeks go on. By the third trimester, it’s common to have noticeably more discharge than earlier in pregnancy. This gradual increase is normal and not a reason for concern on its own.
How Discharge Changes in Late Pregnancy
In the final weeks, you may pass what’s known as the mucus plug, a thicker, jelly-like clump of mucus that has been sealing the cervix throughout pregnancy. It’s usually clear, off-white, or slightly tinged with pink, red, or brown blood. It’s stringy and sticky, roughly 1 to 2 inches in length, and about 1 to 2 tablespoons in volume. Some people lose it all at once; others lose it gradually over several days, making it harder to distinguish from regular discharge.
The key differences: the mucus plug is noticeably thicker and more jelly-like than everyday discharge, and it may contain streaks of blood. A “bloody show,” which sometimes accompanies or follows the mucus plug, is a small amount of bloody discharge caused by blood vessels in the cervix rupturing as it begins to open. Both can be signs that labor is approaching, though it could still be days or even weeks away.
Discharge Colors That Signal a Problem
Not all discharge during pregnancy is harmless. Certain changes in color, smell, or texture can point to an infection or another issue that needs attention.
- Green or yellow discharge can indicate an infection such as a sexually transmitted infection or bacterial vaginosis.
- Gray discharge with a fishy smell is a hallmark of bacterial vaginosis, which is treatable but should not be ignored during pregnancy.
- Thick, white, clumpy discharge that looks like cottage cheese, especially with itching or soreness, typically points to a yeast infection. Yeast infections are more common during pregnancy due to hormonal changes.
- Foul-smelling discharge of any color warrants a call to your provider.
Itching, burning, soreness around the vagina, or pain when you urinate alongside any discharge change are signs that something beyond normal leukorrhea is going on.
How to Tell Discharge From Amniotic Fluid
One of the trickier distinctions in pregnancy is figuring out whether what you’re seeing is discharge, urine, or leaking amniotic fluid. Amniotic fluid is clear, sometimes with small white flecks, and has no smell. It tends to soak through underwear rather than leaving a small spot the way discharge does. Unlike urine, it isn’t yellow and doesn’t smell like ammonia.
A simple test: put on a clean pad and tighten your pelvic floor muscles as if you’re stopping your urine stream. If the pad stays dry, you were likely leaking urine. If fluid continues to appear on the pad despite clenching, it may be amniotic fluid, and you should contact your provider right away. Amniotic fluid that looks green-tinged or brownish-yellow is especially urgent, as it can signal that the baby has passed stool in the womb.
When Discharge Needs Medical Attention
Most pregnancy discharge is perfectly normal. Contact your midwife or doctor if your discharge smells unpleasant or unusual, turns green or yellow, or is accompanied by itching, soreness, or pain during urination. These symptoms are usually treatable with a short course of medication that’s safe during pregnancy.
Any vaginal bleeding beyond light spotting during pregnancy is a reason to seek immediate medical care. The same applies if you suspect you’re leaking amniotic fluid, especially before 37 weeks. Fluid leaking that early can increase the risk of infection and may require monitoring or intervention.
Wearing a panty liner (not a tampon) is the simplest way to manage heavier discharge day to day. Choosing breathable cotton underwear and avoiding scented soaps, douches, or wipes around the vaginal area helps keep the natural balance of bacteria intact and reduces your chances of developing an infection.