Spotting during pregnancy typically looks like a few drops of pink, light red, or dark brown blood on your underwear or on toilet paper when you wipe. It’s light enough that a panty liner won’t fill up, and it’s noticeably different from a period in both color and volume. Roughly 1 in 4 pregnant people experience some spotting, particularly in the first trimester, and the majority go on to have healthy pregnancies.
Color, Texture, and Amount
Pregnancy spotting can range from light pink to rust-brown to dark brown. Pink spotting usually means the blood is fresh but minimal, while brown spotting means the blood has had time to oxidize before leaving your body. Bright red blood is less common with true spotting and more associated with active bleeding, which is a different situation.
The texture varies too. It might be smooth and watery, slightly thick, or mixed with mucus. What it should not contain is large clots. In terms of amount, think drops rather than flow. If you notice a small streak on toilet paper or a few spots in your underwear, that’s spotting. If you’re filling a pad the way you would during a period, that crosses into bleeding, which is not typical during pregnancy and warrants a call to your provider.
Implantation Bleeding in Early Pregnancy
One of the most common and harmless causes of spotting happens before many people even know they’re pregnant. Implantation bleeding occurs about one to two weeks after conception, when a fertilized egg attaches to the uterine lining. It typically lasts one to three days and is very light, often just faint pink or brownish discharge.
Because it tends to show up around the time you’d expect your period, it’s easy to confuse the two. The key differences: implantation bleeding is much lighter than a period, doesn’t increase in flow, and stops on its own within a few days. It also won’t include clots. Many people describe it as barely noticeable, something they only catch when wiping.
Other Harmless Causes of Spotting
During pregnancy, blood flow to the cervix increases significantly, making it more sensitive and more likely to bleed from minor contact. This means spotting can happen after sex, after a pelvic exam, or even after a particularly active day. This type of spotting is usually very light, lasts a few hours at most, and is pink or light brown.
Vaginal or cervical infections can also trigger light spotting. Cervical polyps, which are small noncancerous growths, become more prone to bleeding during pregnancy because of increased blood supply to the area. These causes are generally manageable and don’t threaten the pregnancy.
Subchorionic Hematoma
A subchorionic hematoma is a pocket of blood that collects between the uterine wall and the pregnancy membrane. It’s the most common cause of bleeding in the first half of pregnancy that actually has a name and shows up on an ultrasound, where it appears as a crescent-shaped collection of blood. The bleeding can range from light spotting to heavier flow with clotting, though the majority of people with this condition have no bleeding at all and only learn about it during a routine ultrasound.
Most subchorionic hematomas resolve on their own. Your provider will likely monitor the hematoma with follow-up ultrasounds to make sure it’s shrinking rather than growing.
Spotting in Late Pregnancy
Spotting later in pregnancy has its own set of causes. As your body approaches labor, the cervix begins to soften and dilate, which can release a small amount of blood mixed with mucus. This is sometimes called “bloody show” and is a normal sign that labor is approaching, though it can happen days or even weeks before contractions start. It looks like pinkish or slightly bloody mucus discharge.
Sex and internal exams can still cause spotting in the second and third trimesters for the same reason they do earlier: increased cervical sensitivity. Uterine fibroids or cervical growths may also produce occasional light bleeding.
More serious causes of late-pregnancy bleeding include placenta previa, where the placenta covers part or all of the cervix, and placental abruption, where the placenta separates from the uterine wall before delivery. Both of these tend to produce heavier, bright red bleeding rather than light spotting, and they require immediate medical attention.
When Spotting Becomes a Warning Sign
Light spotting that stops on its own is common and often harmless. One study of women with mild spotting in the first trimester found that about 71% went on to deliver at full term. But certain patterns signal something more urgent.
Heavy bleeding, defined as soaking through more than two maxi pads per hour for two consecutive hours, is a threshold that requires emergency care. Bright red blood that increases in flow rather than tapering off is also concerning, regardless of trimester.
Ectopic pregnancy, where a fertilized egg implants outside the uterus (usually in a fallopian tube), can start with light spotting that looks no different from harmless early-pregnancy bleeding. What sets it apart are the accompanying symptoms: pelvic pain on one side, shoulder pain, extreme lightheadedness, or a sudden urge to have a bowel movement. These symptoms develop because blood from a ruptured tube irritates surrounding nerves. If you experience vaginal bleeding alongside severe pelvic pain, dizziness, or shoulder pain, seek emergency care immediately.
What to Track if You Notice Spotting
If you see spotting during pregnancy, note a few details before calling your provider. Pay attention to the color (pink, brown, or red), whether it’s smooth or contains clots, how long it lasts, and whether it’s accompanied by cramping or pain. These specifics help your provider determine whether the spotting needs further evaluation or is likely benign. A single episode of light brown or pink spotting with no pain is the most reassuring pattern. Recurring episodes, increasing volume, or any accompanying symptoms deserve a closer look.