Do Uterine Polyps Come Back After Surgery?

Uterine polyps can and do come back after surgical removal, though the likelihood varies enormously depending on individual risk factors and how long you wait. Reported recurrence rates range from under 10% to over 40%, with the wide gap largely explained by how long patients were followed and who was studied. The good news is that research has identified several modifiable factors that influence whether a polyp returns, and there are proven strategies to lower your odds.

How Often Polyps Recur

If you search for a single recurrence number, you will find wildly different figures, and that is not because one study is wrong and another is right. It is because recurrence is time-dependent: the longer you wait and keep checking, the more likely a new polyp will show up. One study of women of reproductive age found a recurrence rate of about 8% with a median follow-up of roughly three and a half years.¹ Another found a first-recurrence rate near 24%, with follow-up duration itself being one of the strongest predictors of whether a polyp came back.² And a third reported recurrence in 43% of women, again finding that longer follow-up was a significant driver of that number.³

The takeaway is not that your odds of recurrence are anywhere from 8% to 43%. It is that a polyp returning after five or six years is not the same clinical event as one returning after six months, and studies that follow patients for different durations will produce different headline numbers. A study checking at one year will report a lower rate than one checking at five years, even if they studied the same kind of patient. If your doctor tells you a recurrence rate, ask what follow-up window that figure covers.

What Raises Your Risk

Several factors make recurrence more likely. Some are things you can modify; others are simply part of your medical profile.

• Obesity: A body mass index of 30 or higher is strongly associated with polyp recurrence.¹ Fat tissue produces estrogen, which plays a central role in polyp formation, so this connection is not surprising.
• Multiple polyps at baseline: Women who had more than one polyp at the time of their original surgery face higher recurrence risk.³ Having multiple polyps may signal an endometrial environment that is particularly prone to new growths.
• Larger polyps: Polyps bigger than about 15 mm at the time of removal have been linked to a higher chance of recurrence.²
• Coexisting conditions: Adenomyosis, polycystic ovarian syndrome, and uterine fibroids have all been identified as independent risk factors for polyp return.¹
• Abnormal uterine bleeding: If the polyp was causing irregular or heavy bleeding before removal, recurrence is more likely than in someone whose polyp was found incidentally.²

Incomplete removal is another factor that sometimes masquerades as recurrence. When the base of the polyp is not fully resected, what appears to be a new polyp growing months later may actually be regrowth from the stalk left behind. This is one reason surgical technique matters, a topic discussed below.

The Tamoxifen Connection

Tamoxifen, used widely in breast cancer treatment, deserves its own mention because its effect on polyp recurrence is dramatic. Tamoxifen acts as an estrogen blocker in breast tissue but has the opposite effect in the uterus, stimulating endometrial growth. Research on postmenopausal women taking tamoxifen found that each additional year of tamoxifen treatment increased the risk of recurrent polyps roughly fivefold.⁴ That is an enormous effect size, and it means tamoxifen users who have had polyps removed need particularly close surveillance.

One approach studied in this population is performing endometrial resection (removing a thin layer of the uterine lining) at the same time as polyp removal, which appeared to reduce recurrence in tamoxifen users.⁵ If you are on tamoxifen and have been told you have polyps, this is worth discussing with your gynecologist.

Why the Underlying Biology Encourages Regrowth

Endometrial polyps develop partly because of how the uterine lining responds to estrogen. Researchers have found that the glandular tissue inside polyps expresses higher concentrations of both estrogen and progesterone receptors compared to normal endometrium.⁶ In simpler terms, polyp tissue is more sensitive to hormonal signals than the healthy lining around it. That heightened sensitivity is a property of the tissue itself, not just of the individual polyp that was removed, which helps explain why new polyps can develop in the same uterus after surgery.

In postmenopausal women specifically, the stromal (structural) portion of polyps shows lower progesterone receptor expression, and this decline is related to lower estrogen levels and older age.⁷ The hormonal landscape of the uterus changes across a woman’s life, and the way polyps respond to those changes also shifts. Beyond hormonal factors, researchers have pointed to chronic inflammation, oxidative stress, and even changes in the uterine microbiome as additional contributors to polyp formation and recurrence.⁸

Does the Type of Surgery Matter?

Hysteroscopic polypectomy, where a small camera and instruments are passed through the cervix to remove the polyp under direct visualization, is the standard approach. But within that category, surgeons use different tools: monopolar or bipolar electrosurgical loops, mechanical morcellators (sometimes called tissue-removal systems), polyp forceps, or hysteroscopic scissors. A natural question is whether one tool does a better job at preventing recurrence than another.

The consistent answer from the research is: not really. A comparison of five different hysteroscopic techniques found no significant difference in recurrence of abnormal bleeding among them.⁹ Similarly, a long-term comparison of tissue-removal systems versus bipolar resection found no significant difference in time to recurrence.¹⁰ One study did report that intrauterine morcellation might lead to lower recurrence compared to conventional hysteroscopic resection, despite the morcellation group having larger and more numerous polyps, though the researchers discussed this cautiously.¹¹

What does clearly matter is that hysteroscopic removal is far superior to blind curettage (scraping the uterine lining without visual guidance). An older but still relevant study found that recurrence was about 14% when polyps were removed under direct hysteroscopic visualization, compared to 46% when the procedure was a blind curettage.¹² If your doctor is recommending a D&C (dilation and curettage) without hysteroscopy for an already-identified polyp, it is worth asking whether hysteroscopic removal is available, because the ability to see the polyp during removal makes complete excision far more likely.

Preventing Recurrence with Hormonal Treatment

Because polyps are hormonally driven, it makes sense that hormonal therapies after removal could lower the chance of regrowth. The best-studied prevention strategy is the levonorgestrel-releasing intrauterine system, commonly known by the brand name Mirena. This device sits inside the uterus and releases a steady, low dose of a progestin directly into the uterine lining, thinning it over time.

The evidence here is fairly convincing. A retrospective study found that only about 3.5% of premenopausal patients with the device experienced recurrence within three years, compared to about 16% of those without it.¹³ A large single-center study comparing the device to oral progestins found that both reduced recurrence compared to no treatment, but the intrauterine device outperformed oral medication.¹⁴ A meta-analysis of 19 randomized controlled trials reached the same conclusion: the intrauterine system was more effective and had fewer side effects than oral progestins for preventing polyp recurrence.¹⁵

Other hormonal options have also shown benefit. A comparison of three different hormonal approaches after polypectomy found that the levonorgestrel intrauterine system, a combined oral contraceptive, and an oral progestin all reduced recurrence compared to no treatment, with the intrauterine system again performing best.¹⁶ Beyond recurrence rates, patients who received the intrauterine system along with surgery reported better quality-of-life scores than those who had surgery alone.¹⁷

If you are not a candidate for the intrauterine system or prefer an oral option, oral progestins still offer meaningful protection compared to doing nothing. The research is clearest for premenopausal women; less data exists for postmenopausal women who are not on tamoxifen. Your gynecologist can help weigh the trade-offs based on your specific circumstances, including whether you are trying to conceive (since the intrauterine device is also a contraceptive).

Polyps and Fertility

For women trying to get pregnant, polyps present a different set of concerns. The question is not just “will the polyp come back?” but “does removing it improve my chances of conceiving, and should I delay fertility treatment while monitoring for recurrence?”

A review of the available evidence found that hysteroscopic polyp removal was associated with improved clinical pregnancy rates in patients undergoing intrauterine insemination, though the benefit was less clear for those going through IVF.¹⁸ This makes intuitive sense: a polyp sitting in the uterine cavity can physically interfere with implantation, and removing it restores a more favorable environment. But it also means that fertility patients who are advised to use a levonorgestrel IUD for recurrence prevention face an obvious conflict, since the device also prevents pregnancy. For these women, the typical approach is polyp removal followed by a relatively short window before attempting conception, without the IUD. If a polyp recurs after a pregnancy or after fertility treatment is completed, prevention strategies can then be considered.

When to Worry About More Than Recurrence

Most endometrial polyps are benign, and when they recur, the recurrent polyps are usually benign too. But the question that quietly worries many patients is whether recurrence raises the risk of something more serious, like endometrial cancer or a precancerous change.

Postmenopausal women have a somewhat higher baseline risk of malignancy in endometrial polyps compared to premenopausal women, and clinical data show that postmenopausal women are also more likely to be asymptomatic, meaning polyps can go unnoticed longer.¹⁹ For this reason, most guidelines recommend that postmenopausal polyps be removed and sent for pathology, even if they are not causing symptoms. In premenopausal women, the risk of malignancy in a polyp is low, but it is not zero, and recurrent polyps should still be evaluated rather than simply assumed to be harmless repeat visitors.

If you have had a polyp removed and are told at a follow-up ultrasound that something has returned, your doctor will likely recommend another hysteroscopy rather than just watching and waiting, particularly if you are postmenopausal, if the polyp is causing new bleeding, or if you have other risk factors like obesity or tamoxifen use. The tissue removed during a repeat procedure should be sent for pathology, just as it was the first time.

Monitoring After Removal

There is no universally agreed-upon surveillance schedule for women after polypectomy. Many gynecologists recommend a follow-up ultrasound at around 6 to 12 months, but the timing and frequency depend on your individual risk profile. Transvaginal ultrasound is usually the first imaging step, though it has limitations. Hysteroscopy remains the most accurate way to detect polyps, with higher sensitivity than ultrasound alone.²⁰ In practice, though, hysteroscopy is more invasive than an ultrasound and is not used as a routine screening tool in asymptomatic patients.

A practical approach is to return for evaluation if you develop new symptoms, particularly abnormal bleeding. If you had a polyp removed because it was causing heavy or irregular periods and your symptoms initially resolved but then returned, that warrants investigation. If your polyp was found incidentally and you remain asymptomatic, your doctor may opt for periodic ultrasound surveillance rather than repeat hysteroscopy. Women on tamoxifen, those with multiple prior polyps, or those with other risk factors already discussed may benefit from a more aggressive monitoring plan.

Small Polyps That Were Never Removed

Not all polyps end up being removed surgically. Some are small, asymptomatic, and found incidentally during imaging for another reason. In these cases, doctors sometimes recommend conservative management, meaning monitoring without immediate surgery. Research into this approach has found that some polyps regress on their own, particularly small ones in premenopausal women. Among patients whose polyps did resolve without surgery, about 7% later developed new polyps during follow-up, and the use of hormonal medications was linked to both initial regression and subsequent recurrence patterns.²¹

This means the recurrence question is not only relevant to women who have had surgery. Even if your polyp went away on its own, new ones can still develop. The same underlying uterine environment that produced the first polyp persists, and without intervention to change that environment, the door remains open for new growths. Whether you had surgical removal or a polyp that regressed naturally, staying attuned to symptoms and keeping up with scheduled follow-ups is the most reliable way to catch a recurrence early.