An early miscarriage typically looks like heavy period bleeding, often with blood clots and sometimes small pieces of grey-white tissue. Depending on how far along the pregnancy was, you might also pass a small, clear fluid-filled sac. The experience varies quite a bit from person to person, and what you see depends largely on the gestational age at the time of the loss.
What the Tissue Looks Like
In the earliest weeks (before five weeks), a miscarriage can be almost indistinguishable from a late, heavy period. This is sometimes called a chemical pregnancy, and many people experience it without ever realizing they were pregnant. The only clue may have been a positive pregnancy test followed by a negative one a few weeks later. At this stage, there is no visible embryo or sac, just bleeding that resembles a normal period, sometimes slightly heavier.
Around six to eight weeks, the bleeding tends to be heavier than a typical period and often includes clots. You may notice tissue that looks like a blood clot mixed with grey-white or pinkish material. Some people pass a small, clear sac that may be visible among the blood. The embryo itself is very small at this stage, roughly the size of a pea or smaller, and may not be distinguishable from surrounding tissue.
Between eight and twelve weeks, the amount of tissue and bleeding increases. Clots can be larger, and you’re more likely to recognize tissue that looks different from a blood clot. The sac is more defined, and some people can identify it. The bleeding at this stage is often significantly heavier than a period and can last longer.
How It Differs From a Period
The most common sign of miscarriage is vaginal bleeding, which can range from light spotting or brownish discharge to heavy, bright-red bleeding with clots. What sets it apart from a period is usually the intensity. Miscarriage bleeding tends to be heavier, the clots can be larger, and cramping is often more painful than typical menstrual cramps.
Period cramps are usually manageable and don’t stop you from going about your day. Miscarriage cramping can be more severe, sometimes intense enough that it’s hard to focus on anything else. The pain often radiates through the lower abdomen and into the lower back. Some people describe it as waves of cramping that build in intensity as tissue passes, then ease afterward.
How Long the Process Takes
If you’re miscarrying naturally (without medication or a procedure), the active passing of tissue usually happens over several hours to a few days. The heaviest bleeding and cramping tend to occur in a concentrated window, though lighter bleeding and spotting can continue for up to two or three weeks afterward.
When the pain and bleeding lessen or stop, that generally means the miscarriage is complete. If bleeding hasn’t started within seven to fourteen days of a diagnosis, or if it continues to get worse rather than tapering off, that can mean the process hasn’t finished. In that case, medication or a procedure may be offered to help. Medication typically begins working within a few hours and can cause bleeding that lasts up to three weeks. A home pregnancy test about three weeks after treatment can confirm the process is complete.
Miscarriage Risk by Week
The risk of miscarriage drops sharply as pregnancy progresses. A study tracking women who had a normal first prenatal visit found the overall risk was 1.6%, but when broken down by week, the picture is more specific: 9.4% at six completed weeks, 4.2% at seven weeks, 1.5% at eight weeks, and 0.5% at nine weeks. By ten weeks, the risk was 0.7%. For women with no symptoms who reach eight weeks, the chance of miscarriage is quite low.
Warning Signs That Need Urgent Attention
Some amount of bleeding and cramping is expected during a miscarriage, but certain signs indicate you need medical help quickly. Soaking through one maxi pad per hour for two to three consecutive hours is considered heavy enough to warrant emergency care. Feeling lightheaded or dizzy alongside the bleeding is another red flag, as it can signal significant blood loss.
Other signs to watch for include a fever above 100.4°F (especially more than once), foul-smelling vaginal discharge, and severe abdominal pain, particularly if it’s sharp and one-sided. One-sided pain can sometimes point to an ectopic pregnancy, which requires different and more urgent treatment than a standard miscarriage. Passing clots larger than a golf ball or having bright red bleeding that persists beyond two weeks also warrants a call to your care team.
Managing Pain at Home
For miscarriages that are being managed at home, over-the-counter pain relief with acetaminophen and ibuprofen together is the standard recommendation. A heating pad on your lower abdomen or back can also help with cramping. Having maxi pads on hand rather than tampons is generally advised so you can monitor how much you’re bleeding and whether clots are increasing in size. Keep track of how many pads you’re going through per hour, since that’s the key measure your care team will ask about if you need to call.
How a Miscarriage Is Confirmed
Bleeding in early pregnancy doesn’t always mean a miscarriage. Many pregnancies involve some spotting and continue normally. To confirm a pregnancy loss, doctors use ultrasound and sometimes repeated blood tests to check whether hormone levels are rising or falling.
On ultrasound, specific measurements help determine viability. An empty gestational sac measuring 25 mm or larger without a visible embryo, or an embryo measuring at least 7 mm without a detectable heartbeat, are considered definitive criteria for pregnancy loss. When measurements fall below those thresholds, a follow-up ultrasound a week or two later is usually recommended before any diagnosis is made, because the pregnancy may simply be earlier than expected.