A missed miscarriage is a pregnancy that has stopped developing but remains in the uterus, with no bleeding, cramping, or other outward signs that something has gone wrong. Unlike other types of miscarriage where the body begins to expel tissue on its own, a missed miscarriage is typically discovered only during a routine ultrasound, when no heartbeat is detected or the embryo has not grown as expected. Many people still feel pregnant for days or even weeks afterward, which makes the diagnosis especially disorienting.
Why You Still Feel Pregnant
The hallmark of a missed miscarriage is the absence of typical miscarriage symptoms. You may still have morning sickness, breast tenderness, and fatigue because your pregnancy hormones haven’t dropped yet. The placental and pregnancy tissue continues to produce hormones even after the embryo stops developing, and it can take weeks for those levels to fall enough for symptoms to fade. This delay is exactly why the miscarriage gets “missed” by the person experiencing it.
In some cases, the only clue is that symptoms gradually become less intense. But plenty of healthy pregnancies also have fluctuating symptoms, so there’s no reliable way to tell the difference without an ultrasound.
How It’s Diagnosed
A missed miscarriage is confirmed through ultrasound, but doctors use strict measurement thresholds to avoid a false diagnosis. An embryo measuring 7 mm or more from head to rump with no detectable heartbeat is considered definitive evidence of pregnancy loss. Similarly, a gestational sac with a mean diameter of 25 mm or more that contains no visible embryo confirms the diagnosis.
When measurements fall below those cutoffs, the situation is considered suspicious but not certain. An embryo smaller than 7 mm without a heartbeat, or a sac measuring 16 to 24 mm without an embryo, calls for a follow-up ultrasound, usually about a week later, to check for growth. Earlier diagnostic thresholds used smaller cutoffs but carried false-positive rates as high as 8%, meaning some viable pregnancies were incorrectly classified as losses. The current, more conservative guidelines exist to prevent that.
If your provider schedules a second scan, the wait can feel agonizing, but it exists to protect against misdiagnosis.
What Causes It
Most missed miscarriages happen because of chromosomal abnormalities in the embryo that prevent normal development. These are random errors during cell division, not something caused by anything you did or didn’t do. Known risk factors include age of both biological parents, pregnancy history (particularly previous losses), certain medical conditions, ethnicity, and lifestyle factors like smoking or heavy alcohol use. But in many cases, no specific cause is ever identified.
Treatment Options
Once a missed miscarriage is confirmed, you generally have three paths: waiting for your body to pass the tissue naturally, using medication to speed the process, or having a minor surgical procedure. Each approach has trade-offs, and the right choice depends on how far along you were, your medical history, and your personal preferences.
Waiting for Natural Passage
Expectant management means giving your body time to recognize the loss and expel the tissue on its own. In women whose pregnancies resolve without intervention, pregnancy hormone levels typically drop by about 50% every two days, with full resolution (hormones returning to baseline) taking a median of 21 days. Over 95% of women who resolve naturally see their hormone levels cut in half within the first week.
The downside is unpredictability. You won’t know exactly when the process will begin or how long it will take, and for some people, the tissue does not pass completely on its own. There is also a small but real risk: if non-viable tissue is retained for five to six weeks or longer, roughly 25% of cases can develop a serious clotting complication. For this reason, your provider will monitor you closely and may recommend a different approach if the process stalls.
Medication
Medication management uses one or two drugs to prompt the uterus to contract and pass the pregnancy tissue. The most effective regimen combines two medications taken a day or two apart. With that combination, about 84% of cases resolve with a single dose. When only the second drug is used on its own, success rates drop to around 67% to 71%.
You can expect heavy bleeding and strong cramps, often starting within a few hours of taking the second medication. Most people manage this at home. If the tissue doesn’t fully pass, a surgical procedure may still be needed.
Surgical Procedure
Two types of minor procedures can remove the tissue. One uses gentle suction under general anesthesia, takes about 30 minutes, and requires you to fast beforehand and avoid driving for 48 hours afterward. The other uses a small suction tube under local anesthesia, so you’re awake but the cervix is numbed. You may feel cramping during this version.
With either approach, you can typically go home within two to four hours and return to work within a few days. Bleeding similar to a period lasts about 7 to 10 days. Complications like infection, heavy bleeding, or scarring occur in only 1 to 2 out of every 100 procedures. More serious complications, such as injury to the uterus, happen in roughly 1 in 1,000 cases.
Recovery and Trying Again
Physical recovery from a missed miscarriage is relatively quick regardless of which treatment path you choose. Bleeding and cramping typically taper off within one to two weeks, and most people get their period again within four to six weeks.
Emotional recovery is a different timeline entirely, and there is no “normal” way to feel. Grief, guilt, numbness, relief, anger, or some shifting combination of all of these are common responses. The fact that your body gave you no warning can add a layer of confusion or mistrust that takes time to process.
From a medical standpoint, there is no strong evidence that you need to wait multiple cycles before trying to conceive again. Many providers now advise that you can try once you feel physically and emotionally ready. One miscarriage, even two, does not typically indicate an underlying fertility problem. Most people who experience a missed miscarriage go on to have a healthy pregnancy afterward.