A D&C (dilation and curettage) is needed in two broad situations: to diagnose the cause of abnormal uterine bleeding, or to remove tissue from the uterus after a pregnancy loss, incomplete miscarriage, or other complication. It can be either a diagnostic tool or a treatment, and the reasons differ depending on whether you’re pregnant or not.
After a Miscarriage or Pregnancy Loss
Early pregnancy loss is one of the most common reasons for a D&C. If a pregnancy has ended but the tissue hasn’t fully passed on its own, a D&C removes the remaining tissue from the uterus. The specific pregnancy-related situations that call for a D&C include:
- Missed miscarriage: the pregnancy has stopped developing, but your body hasn’t begun to pass the tissue
- Incomplete miscarriage: some tissue has passed, but some remains in the uterus
- Molar pregnancy: an abnormal fertilized egg that forms a mass of tissue instead of a viable pregnancy
- Retained tissue after delivery: placental or pregnancy tissue left behind after childbirth
A D&C isn’t always the first option after a miscarriage. For women without medical complications or symptoms requiring urgent surgery, the choice between waiting for the body to pass the tissue naturally, using medication, or having a surgical procedure can safely reflect the patient’s own preference. A D&C becomes more clearly necessary when there’s heavy bleeding that won’t stop, signs of infection like fever, or when other approaches haven’t worked.
Retained Tissue After Childbirth
Sometimes pieces of the placenta or other tissue stay attached to the uterine wall after delivery. The most common sign is heavy or irregular vaginal bleeding in the weeks after giving birth. Other warning signs include a tender or enlarged uterus, pelvic pain, and fever. An ultrasound can detect a thickened uterine lining or tissue masses, and a specialized color Doppler ultrasound can show whether that tissue still has a blood supply, which suggests it’s still attached. If retained tissue is confirmed, a D&C is one of the standard treatments to remove it and prevent infection.
Diagnosing Abnormal Uterine Bleeding
Outside of pregnancy, D&C is primarily a diagnostic procedure. Its most important role is ruling out endometrial cancer or precancerous changes in the uterine lining, particularly in two groups: women over 45 and women who have been exposed to estrogen without the balancing effect of progesterone.
In most cases, doctors start with an office-based endometrial biopsy, which is simpler and less invasive. A D&C and an office biopsy detect cancer at similar rates, with one large study finding that an office biopsy caught 93.8% of low-grade cancers while curettage caught 97%. For high-grade cancers, the numbers were even closer: 99.2% versus 100%. So a D&C isn’t automatically better for diagnosis.
However, a D&C becomes necessary when:
- The office biopsy can’t be completed: you can’t tolerate the procedure, or it doesn’t collect enough tissue for a diagnosis
- The cervix is too narrow: cervical stenosis can prevent the biopsy instrument from reaching the uterus
- Bleeding persists despite a normal biopsy result: if you continue to have unexplained bleeding after a biopsy came back benign, a D&C provides a more thorough tissue sample
- Precancerous cells were found: if a biopsy shows precancerous changes in the uterine lining, a D&C may be needed to rule out actual cancer nearby
Postmenopausal Bleeding
Any bleeding after menopause warrants investigation because it can signal endometrial cancer. The first step is typically a transvaginal ultrasound to measure the thickness of the uterine lining. Current guidelines use a threshold of more than 4 mm in women with postmenopausal bleeding as a trigger for further evaluation with a biopsy. For women without bleeding symptoms, a lining thicker than 8 mm found incidentally on imaging may prompt a biopsy. If that initial biopsy is inconclusive or comes back normal but bleeding continues, a D&C is the next step.
Emergency Treatment for Heavy Bleeding
A D&C can also serve as an emergency treatment. When a non-pregnant woman has severe uterine bleeding that hasn’t responded to medications and she’s becoming unstable from blood loss, a D&C can provide a temporary reduction in bleeding by physically removing the thickened uterine lining. It’s important to know this is a short-term fix. A D&C alone doesn’t diagnose or treat the underlying cause of the bleeding, so further evaluation is still needed afterward.
What Happens During the Procedure
The name describes the two steps. First, the cervix is gradually widened (dilated), sometimes with medication beforehand to soften it. Then the uterine lining is either scraped with a surgical instrument (curettage) or, more commonly in pregnancy-related cases, cleared using gentle suction with a manual or electric vacuum device. The procedure is typically done under some form of anesthesia and takes roughly 7 to 14 minutes depending on the technique used.
Many pregnancy-related D&Cs now use vacuum aspiration rather than sharp scraping instruments. A randomized controlled trial comparing the two methods found similar effectiveness, with incomplete evacuation rates of 2.4% for traditional curettage and 0.6% for manual vacuum aspiration. The complication rate for traditional curettage was about six times higher than for vacuum aspiration in one Japanese safety study. The practical difference matters because the suction approach uses a flexible plastic tip rather than metal instruments, which is gentler on the uterine lining.
Recovery After a D&C
Most people return to their regular activities within five days or fewer. Mild cramping and light spotting for a few days afterward is normal. You’ll want to contact your doctor if you develop a fever, heavy bleeding, large blood clots, severe abdominal cramps, or unusual or foul-smelling discharge, as these can signal infection or other complications.
Risk of Uterine Scarring
The most significant long-term risk of a D&C is uterine scarring, sometimes called Asherman’s syndrome. Scar tissue forms inside the uterus and can cause lighter periods, missed periods, or fertility problems. In a study of over 1,500 women treated for early pregnancy loss, about 1% of those who had suction-based evacuation developed Asherman’s syndrome. Among women who specifically had sharp curettage (the traditional scraping method), the rate was 1.2%, and all six diagnosed cases involved sharp curettage. Half of those women had undergone a repeat procedure, which increases the risk further.
No cases of Asherman’s syndrome were reported in women who had manual vacuum aspiration or who managed their miscarriage with medication alone. This is one reason vacuum-based techniques have largely replaced sharp curettage for pregnancy-related D&Cs. The flexible plastic tip used in vacuum aspiration is less likely to damage the deeper layers of the uterine lining where new tissue regenerates. If you’re having a D&C for a pregnancy loss and future fertility matters to you, it’s worth asking which technique will be used.