Spotting during pregnancy: causes and when to get help

If you are pregnant and bleeding, check these emergency signs first. The NHS treats bleeding in pregnancy as an emergency when it comes with severe abdominal pain, pain in the shoulder, or feeling sick, faint or dizzy, and when it is heavy enough to soak a period pad soon after you put it on (NHS, "Vaginal bleeding in pregnancy", 2026). In the UK, call the emergency number or go to A&E, the hospital emergency department; in the US, call the emergency number or go to the nearest emergency room. The box above shows the emergency and urgent numbers for where you are, and get help now lists the other symptoms that need checking straight away.

Spotting, light bleeding and heavy bleeding

What is spotting during pregnancy? The NHS uses three terms for vaginal bleeding in pregnancy, and the difference between them is part of deciding how quickly to get help (NHS, "Vaginal bleeding in pregnancy", 2026):

The NHS adds that the bleeding may be constant or may come and go. Light spotting during pregnancy, on these definitions, is the smallest amount, and the NHS gives no amount of it that does not need advice: its list for urgent help starts at light bleeding or spotting with no pain (NHS, "Vaginal bleeding in pregnancy", 2026). Pregnant spotting and spotting while pregnant are the same thing under other names.

Pink, red or brown

What does spotting look like when pregnant, or what does spotting look like in early pregnancy? The NHS lists pink, red and brown for both spotting and light bleeding (NHS, "Vaginal bleeding in pregnancy", 2026). It does not say that any color is less of a concern than another, and none of the sources cited here does. Brown spotting during pregnancy, including brown spotting in early pregnancy, falls under the same definition as pink or red spotting. This page shows no pictures: what early pregnancy spotting looks like in someone else's photograph cannot tell you how much you are bleeding or why.

Spotting in early pregnancy: how common it is

Spotting in early pregnancy is common enough that ACOG gives a figure for all bleeding in the first trimester: it happens in 15 to 25 in 100 pregnancies (ACOG, "Bleeding During Pregnancy", 2021). The largest community study of early pregnancy spotting followed 4,539 pregnant women aged 18 to 45 in the US Right From the Start study between 2000 and 2008. About a quarter, 1,207 women, reported some bleeding in the first trimester, setting aside bleeding at the time of a pregnancy ending, and only 8 in 100 of the women who bled reported heavy bleeding. Most episodes lasted less than 3 days, and most happened between weeks 5 and 8 of pregnancy. Of the 1,555 episodes of spotting or light bleeding, 28 in 100 came with pain (Hasan et al., 2010).

Those figures describe a group of women, not any one pregnancy. Is it normal to spot during pregnancy, then? Spotting during early pregnancy, and spotting during pregnancy in the 1st trimester in particular, is common in these studies, and ACOG still advises contacting your ob-gyn if you have any bleeding at any time during pregnancy (ACOG, "Bleeding During Pregnancy", 2021).

Spotting with or without pain

Pain changes the advice more than color does. In the Hasan study, 28 in 100 episodes of spotting or light bleeding came with pain, and 54 in 100 of the 100 episodes of heavy bleeding did (Hasan et al., 2010). The NHS advises urgent help for light bleeding or spotting even with no pain or only mild tummy pain, and the emergency number when bleeding comes with severe tummy pain or pain in the shoulder (NHS, "Vaginal bleeding in pregnancy", 2026). Spotting with no pain is therefore still a reason to call; spotting with severe pain is a reason to call the emergency number.

How long does spotting last in early pregnancy?

In the Hasan study, most episodes of bleeding lasted less than 3 days (Hasan et al., 2010). That is how long episodes lasted across 1,656 episodes in 1,207 women; it is not a length that marks spotting as having one cause or another. The NHS describes implantation bleeding as a bleed like a very light period around the time a period is due (NHS, "Signs and symptoms that might mean you're pregnant", 2026), and implantation bleeding explains why it cannot be told apart from other bleeding at home. When does implantation occur covers the timing of that earliest bleeding.

What can cause spotting during pregnancy

The NHS lists these causes of bleeding in pregnancy (NHS, "Vaginal bleeding in pregnancy", 2026):

• implantation bleeding in very early pregnancy, when the egg implants into the womb;
• changes to the blood vessels in the cervix, the entrance to the womb, which can cause bleeding after sex, for example;
• a leak of blood from inside the womb;
• infection, such as a urine infection or a sexually transmitted infection;
• complications with the placenta, such as placenta previa;
• a "show", when the plug of mucus that seals the cervix comes away, sometimes with blood, which can mean labor is starting.

The NHS also says it is sometimes not possible to find the cause. ACOG says vaginal bleeding in pregnancy has many causes, some serious and some not, names infection, early pregnancy loss and ectopic pregnancy as problems that can cause bleeding in early pregnancy, and says bleeding later in pregnancy can be more serious (ACOG, "Bleeding During Pregnancy", 2021). It also says vaginal bleeding is sometimes the only sign of an ectopic pregnancy, and that other symptoms can include abdominal, pelvic or shoulder pain, sometimes before you know you are pregnant (ACOG, "Bleeding During Pregnancy", 2021).

Spotting after sex while pregnant

ACOG says the cervix may bleed more easily in pregnancy because more blood vessels are developing there, and that spotting or light bleeding after sex, a Pap test or a pelvic exam is not uncommon (ACOG, "Bleeding During Pregnancy", 2021). The NHS lists changes to the blood vessels in the cervix, which can cause bleeding after sex, among its causes (NHS, "Vaginal bleeding in pregnancy", 2026). Spotting after sex while pregnant is still bleeding in pregnancy, and the routes below apply to it.

When spotting needs urgent help

Bleeding in early pregnancy is routed differently in the UK and the US. The NHS gives two levels of urgency, and ACOG gives one instruction for any bleeding.

The table follows the NHS's two pages (NHS, "Vaginal bleeding in pregnancy", 2026; NHS, "Stomach pain in pregnancy", 2024) and ACOG's (ACOG, "Bleeding During Pregnancy", 2021). The box at the top of this page shows the numbers for where you are, and bleeding in early pregnancy lists who to contact. If spotting comes with cramps, cramping in early pregnancy sets out the NHS list for stomach pain.

What happens when spotting is checked

The NHS says you will be asked about your health, your symptoms and how many weeks pregnant you are, and possibly about bleeding or pregnancies in the past. At a hospital or early pregnancy unit, a doctor, nurse or midwife may look inside the vagina, do an ultrasound scan on the tummy or inside the vagina, take blood tests and test a sample of urine. Treatment depends on the cause and on how many weeks pregnant you are, and you may not need any if tests find the bleeding is not serious and the pregnancy is healthy (NHS, "Vaginal bleeding in pregnancy", 2026). hCG levels explains one of the blood tests.

Spotting by week

Most bleeding episodes in the Hasan study fell between weeks 5 and 8 (Hasan et al., 2010). Spotting at 5 weeks pregnant, spotting at 6 weeks pregnant, spotting at 7 weeks pregnant and spotting at 8 weeks pregnant all fall under the same NHS definitions and the same advice as at any other week of the first trimester: none of the sources cited here gives advice for spotting that differs by week in those weeks. The week-by-week guide covers what the NHS describes at 5 weeks pregnant, 6 weeks pregnant, 7 weeks pregnant and 8 weeks pregnant.

This guide is information, not a diagnosis or a recommendation of treatment, and it is no substitute for your own clinician. See the medical disclaimer.