A missed miscarriage often looks like nothing at all, and that’s what makes it so disorienting. The pregnancy has stopped developing, but your body hasn’t caught up yet. There’s typically no bleeding, no cramping, and no obvious sign that anything has gone wrong. Most people find out during a routine ultrasound when no heartbeat is detected, sometimes days or weeks after the embryo actually stopped growing.
Why There Are No Obvious Signs
In a typical miscarriage, the body recognizes the loss and begins expelling pregnancy tissue, which causes bleeding and cramping. In a missed miscarriage, that process stalls. The embryo or fetus has died, but the pregnancy tissue remains in the uterus. Pregnancy hormones can stay elevated for some time afterward, which means you may still feel pregnant. A home pregnancy test may still read positive. Symptoms like breast tenderness and nausea can persist, though some people notice these fading gradually.
The exact reason the body fails to expel the tissue on its own isn’t fully understood. Researchers believe processes related to blood vessel formation, inflammation, and cell death play a role, but there’s no single clear explanation for why some losses are “missed” and others aren’t.
What You Might Notice Before Diagnosis
Because a missed miscarriage produces so few outward signs, most people don’t suspect anything is wrong. The clues that do appear tend to be subtle and easy to dismiss:
- Fading pregnancy symptoms. Morning sickness, breast soreness, or fatigue may gradually ease. This can feel like normal symptom fluctuation, which is why it’s rarely alarming on its own.
- Light spotting. Some people notice brown or pink discharge, though many have none at all.
- A sense that something feels “off.” This is vague and not medically diagnostic, but many people describe it in hindsight.
None of these are reliable indicators. Pregnancy symptoms come and go in healthy pregnancies too. The definitive answer comes from ultrasound.
How It’s Diagnosed
A missed miscarriage is confirmed when an ultrasound shows either an embryo without a heartbeat or a gestational sac that has stopped growing as expected. If there’s any ambiguity, your provider will typically repeat the ultrasound about a week later to confirm there’s been no growth, rather than diagnosing based on a single scan.
Blood tests measuring hCG (the pregnancy hormone) can also raise suspicion. In a healthy early pregnancy, hCG levels roughly double every 48 hours. When levels are much lower than expected for the gestational age or fail to rise appropriately, it suggests the pregnancy may not be viable. But hCG alone doesn’t confirm a missed miscarriage. It’s one piece of the puzzle alongside ultrasound findings.
What Tissue Looks Like If It Passes
Some missed miscarriages eventually progress to active miscarriage on their own, or tissue passes after medical treatment. What you see depends heavily on how far along the pregnancy was.
Around 6 weeks, most people can’t identify anything recognizable. You may see blood clots and a small fluid-filled sac. The embryo at this stage is roughly the size of a pinky fingernail, and you might notice what looks like a tiny cord.
Around 8 weeks, the tissue often looks dark red and shiny, sometimes described as resembling liver. A sac may be visible with a small bean-sized embryo inside. At this stage, early features like where the eyes and limbs were forming may be faintly visible if you look closely. Beyond 8 weeks, you’re more likely to see recognizable tissue and larger clots, along with membrane-like material.
This can be emotionally difficult to witness. Some people prefer not to look, and that’s completely fine. Others find it meaningful. There’s no right or wrong response.
What Happens After Diagnosis
Once a missed miscarriage is confirmed, there are three paths forward: waiting for the body to pass the tissue naturally, using medication to help the process along, or having a minor surgical procedure.
Waiting It Out
Some people choose to let nature take its course. This can work, but the timing is unpredictable. It may take days or weeks for bleeding to begin, and there’s no guarantee the tissue will pass completely on its own. This uncertainty is manageable for some people and stressful for others.
Medication
Medication speeds things up and makes complete passage more likely than waiting alone. In the largest U.S. trial on this approach, 71% of women passed the tissue completely within three days of a single dose. When a second dose was given if needed, the success rate rose to 84%. The process involves cramping and heavy bleeding, typically over several hours to a few days. It’s done at home.
Surgical Procedure
A minor procedure to remove the tissue is the fastest and most predictable option. It’s typically done in an outpatient setting, takes about 10 to 15 minutes, and recovery is generally quick. This is often recommended when there are signs of infection, heavy bleeding, or when the other approaches haven’t worked.
No single option is medically superior for everyone. The choice often comes down to personal preference, how far along the pregnancy was, and individual health factors.
Risks of Prolonged Waiting
While short-term waiting is generally safe, a missed miscarriage that goes unmanaged for an extended period carries real risks. The most concerning is a serious clotting disorder: roughly 25% of people with a prolonged intrauterine fetal death develop dangerous changes in their blood’s ability to clot, typically around 5 to 6 weeks after the loss occurs. Early detection through ultrasound and timely management have made this complication much rarer, but it’s one reason providers don’t recommend indefinite waiting.
Infection is the other major concern. Retained pregnancy tissue can become a breeding ground for bacteria, leading to fever, worsening pain, and foul-smelling discharge. These are signs to take seriously and act on quickly.