Vaginal discharge increases during pregnancy, and in most cases it’s completely normal. Your body produces more of it because of rising estrogen levels, increased blood flow to the vaginal walls, and extra mucus production from the cervix to help protect the pregnancy. This discharge has a name: leukorrhea. Understanding what’s normal and what’s not can save you unnecessary worry while also helping you spot the few situations that do need attention.
What Normal Pregnancy Discharge Looks Like
Healthy pregnancy discharge is usually white, milky, or pale yellow. It feels thin, slippery, or slightly mucus-like, and it carries only a mild odor. You’ll likely notice it increases as your pregnancy progresses, which is expected. By the third trimester, it can become noticeably heavier and thicker.
The amount varies from person to person, but most pregnant women produce enough to notice it on their underwear daily. A panty liner can help you stay comfortable. Avoid douching or using scented products in the vaginal area, as these can disrupt the naturally acidic environment (which typically stays between 3.8 and 4.5 pH) that keeps harmful bacteria in check.
Why Your Body Produces More Discharge
Three things drive the increase. First, estrogen levels climb dramatically during pregnancy, and estrogen directly stimulates vaginal secretions. Second, blood flow to the pelvic area increases to support the growing pregnancy, and the vaginal walls respond by producing more fluid. Third, your cervix ramps up mucus production to form and maintain the mucus plug, a protective barrier that seals the cervical opening and helps shield the baby from infection. Some of that extra cervical mucus makes its way out as discharge.
Discharge That May Signal a Yeast Infection
Pregnancy makes yeast infections more common, again because of elevated estrogen. If your discharge turns thick, white, and clumpy (often described as looking like cottage cheese), you may have one. Yeast infections typically come with itching, burning, or irritation around the vulva but produce little to no odor.
Over-the-counter antifungal creams and suppositories are generally considered safe throughout pregnancy. A seven-day formula tends to work better than shorter courses. Oral antifungal medications are a different story: some prescription pills have been linked to miscarriage or birth defects, particularly in the first trimester, so topical treatments are the preferred route during pregnancy.
Signs of Bacterial Vaginosis
Bacterial vaginosis (BV) happens when the balance of bacteria in the vagina shifts. The hallmark sign is a thin white or gray discharge with a strong fishy smell, especially after sex. You might also notice itching, burning during urination, or irritation around the outside of the vagina. Many people with BV have no symptoms at all, which is why providers sometimes screen for it during prenatal visits.
BV matters more during pregnancy than it otherwise might. It’s associated with a higher risk of preterm birth and low birth weight. If you notice the characteristic fishy odor or grayish discharge, getting tested is straightforward: a provider examines a sample of vaginal fluid and can confirm the diagnosis quickly. Treatment with provider-prescribed medication can reduce those risks.
Yellow-Green or Foul-Smelling Discharge
A frothy, yellow-green discharge with a strong unpleasant odor can indicate a sexually transmitted infection such as trichomoniasis. Vulvar irritation may accompany it, though many infections produce no symptoms at all. Chlamydia and gonorrhea can also cause unusual discharge during pregnancy, sometimes with pelvic discomfort or pain during urination. These infections are treatable, but they need to be identified first, which is one reason STI screening is part of standard prenatal care.
Pink or Brown Discharge
Seeing pink or brown on the toilet paper can be alarming, but it doesn’t always mean something is wrong. In early pregnancy, light spotting can result from implantation (when the embryo attaches to the uterine lining), changes to the cervix, or minor cervical irritation after sex or a pelvic exam. Most women who experience spotting or light bleeding in the first trimester go on to have healthy pregnancies.
That said, bleeding can occasionally signal something more serious, including miscarriage or ectopic pregnancy (when a fertilized egg implants outside the uterus, usually in a fallopian tube). Ectopic pregnancy symptoms often include one-sided abdominal pain, shoulder tip pain, or discomfort when using the bathroom. Any vaginal bleeding during pregnancy is worth reporting to your provider so they can rule out complications.
How to Tell Discharge From Amniotic Fluid
Later in pregnancy, a new concern enters the picture: is that wetness discharge, urine, or amniotic fluid? The differences are helpful to know. Normal discharge is white or yellowish with a mild smell. Urine is yellow and has a recognizable odor. Amniotic fluid is clear (sometimes white-flecked or slightly tinged with mucus or blood), has no smell, and tends to soak through your underwear rather than leaving a small spot.
The key distinction is flow pattern. Discharge comes and goes. Urine happens when you sneeze, laugh, or strain. Amniotic fluid often feels like a steady trickle or a sudden gush that you can’t stop by squeezing your pelvic floor muscles. If you suspect you’re leaking amniotic fluid, contact your provider promptly, as it can mean your membranes have ruptured.
The Mucus Plug in Late Pregnancy
As you approach your due date, you may notice a discharge that looks different from anything you’ve seen before: a thick, jelly-like, stringy blob that’s clear, off-white, or streaked with pink or brown. This is the mucus plug, and losing it means your cervix has started to dilate, efface, or both. It’s typically about 1 to 2 inches long and 1 to 2 tablespoons in volume, though it can come out in smaller pieces over several days rather than all at once.
Most women lose the mucus plug after 37 weeks, anywhere from a few days to a few weeks before labor begins. Losing it doesn’t mean labor is imminent, but it does mean your body is preparing. If you notice it before 37 weeks, let your provider know, as early loss can sometimes signal preterm labor or other complications.