Endometrial ablation is a generally safe procedure for treating heavy menstrual bleeding, with serious complications occurring in a small percentage of cases. Mortality has been estimated at 0.26 per 1,000 procedures. But “safe” comes with important caveats: the procedure creates long-term changes inside the uterus that affect pregnancy, cancer screening, and the likelihood of needing further surgery down the road.
Short-Term Complication Risks
The most common serious risk during the procedure itself is uterine perforation, where the instrument passes through the uterine wall. This occurs in roughly 0.8 to 6.4 out of every 1,000 procedures. Other possible complications include excessive bleeding, infection, cervical injury, and in rare cases, thermal injury to nearby organs like the bowel or bladder.
Earlier versions of the procedure (first-generation techniques) required the surgeon to use a camera inside the uterus and manually destroy the lining, which demanded more skill and carried higher complication rates. Newer methods use devices that apply heat, cold, or radiofrequency energy more uniformly across the uterine lining. These second-generation techniques are quicker and simpler to perform, though they still carry risks of equipment failure, infection, perforation, and post-procedure pain.
How Well It Works
About 85% of procedures are considered successful. Around 40% of patients stop having periods entirely, while others see a significant reduction in flow. That still leaves roughly 15% of patients who continue to experience heavy bleeding or develop chronic pelvic pain afterward.
The procedure also doesn’t always provide a permanent solution. About 4.3% of patients need a hysterectomy within the first year, and that number climbs to 12.4% by five years. So roughly 1 in 8 patients eventually undergoes a hysterectomy after ablation. This is something worth factoring into your expectations: ablation may delay a hysterectomy rather than prevent one.
The Risk of Pregnancy After Ablation
Endometrial ablation is not a form of birth control. Pregnancy can still occur afterward, and when it does, the outcomes are often serious. A review of 123 pregnancies following ablation found that 28% ended in spontaneous miscarriage, 31% resulted in preterm delivery, and 14% ended in the death of the baby. One maternal death was also recorded. Ectopic pregnancy occurred in 6.5% of cases.
One of the most dangerous complications is morbidly adherent placentation, where the placenta grows too deeply into the uterine wall. This can cause life-threatening hemorrhage and often requires an emergency hysterectomy and intensive care. Because the uterine lining has been destroyed or scarred, the placenta may attach abnormally in ways it wouldn’t in an intact uterus.
If you have any chance of wanting a future pregnancy, ablation is not appropriate. Reliable contraception is essential after the procedure for anyone who hasn’t gone through menopause.
Post-Ablation Tubal Sterilization Syndrome
If you’ve had your tubes tied (or are considering it alongside ablation), there’s a specific risk to know about. Post-ablation tubal sterilization syndrome causes new or worsening cyclic pelvic pain after both procedures have been done. In one study, about 19% of patients developed this condition. It happens because menstrual blood can still be produced in small pockets of remaining endometrial tissue, but scarring in the uterus traps it, and the blocked tubes prevent it from escaping. The pain can be significant enough to require a hysterectomy.
Challenges With Future Cancer Screening
This is one of the less-discussed safety concerns, and it’s important. After ablation, scar tissue forms inside the uterus. That scarring can make it much harder to detect endometrial cancer later in life. The most common early warning sign of endometrial cancer is abnormal bleeding, but ablation may mask that symptom entirely by blocking blood from leaving the uterus.
Scarring and adhesions also make it physically difficult to perform biopsies or use a camera to examine the uterine lining. Even when tissue samples are obtained, the scarred tissue can be hard to evaluate under a microscope. For patients who develop cervical narrowing (stenosis) after ablation, MRI may be needed as an alternative way to assess the endometrium. This screening challenge persists for the rest of your life after the procedure, which is particularly relevant since endometrial cancer risk increases with age.
Who Should Not Have the Procedure
Certain conditions make ablation unsafe or inappropriate. These include endometrial hyperplasia (a precancerous thickening of the uterine lining) and any known or suspected uterine cancer. Structural abnormalities of the uterus, such as a uterus divided by a wall of tissue or one that’s unusually shaped from birth, are also contraindications. A uterine cavity longer than about 11 centimeters is considered a relative contraindication, meaning the procedure may still be possible but carries additional risk.
Because ablation destroys the uterine lining rather than removing the uterus, it’s designed for people who are done having children and whose heavy bleeding hasn’t responded to other treatments. It’s not a first-line option; it’s typically considered after medications or hormonal treatments haven’t worked well enough.
What Recovery Looks Like
Most people return to normal activities within a few days. Cramping, watery or bloody discharge, and frequent urination are common in the first week or two. These symptoms generally resolve on their own. Some people experience nausea from anesthesia on the day of the procedure.
Warning signs that need prompt medical attention include fever, worsening pain rather than improving pain, heavy bleeding that soaks through a pad in an hour, and foul-smelling discharge, which could signal an infection. Severe or sudden abdominal pain could indicate a perforation that wasn’t detected during the procedure.