Fibroids vs polyps: which needs removal first
Fibroids and polyps aren't interchangeable. Here's what the evidence actually says about which uterine growths need removal before you try to conceive.
In short
Some fibroids don't change the shape of the inside of your uterus (the cavity). Ones on the outer surface are an example. These generally don't need removal to help you conceive. Fibroids that do change the cavity's shape should be removed, even with no symptoms. Removing fibroids that bulge into the cavity is linked to notably higher pregnancy rates. Polyps can get in the way of implantation. But about one in four polyps go away on their own. Was a polyp found during a fertility workup? Removing it before treatment starts is a reasonable, recommended step.
Sourced from ASRM, StatPearls/NCBI, Cleveland Clinic, PMC/NIH · Updated August 15, 2026
If your ultrasound found a "uterine growth," it's tempting to think there's one answer: take it out. But fibroids and polyps are different growths. They behave differently inside your uterus. And here's the surprising part: they don't have the same evidence behind removing them. Some growths really should come out before you keep trying to conceive. Others are fine to leave alone. Some may even go away by themselves.
This difference matters. It changes what your doctor recommends, how urgent things feel, and what surgery can actually do for your chances. This isn't about scaring you into a procedure, or talking you out of one you need. It's about understanding what the evidence says about your specific growth, in your specific spot, before you decide.
Are fibroids and polyps really the same thing?
It's easy to lump fibroids and polyps together. They show up in similar places. They're often found the same way, during an ultrasound or fertility workup you weren't expecting to raise concerns. But they don't follow the same rules for fertility. A fibroid's effect depends almost entirely on where it sits. A polyp's effect has more to do with what it does to your uterine lining, wherever it sits. So the question "does this need to come out?" doesn't have one answer. It has two separate answers. Mixing them up is where a lot of needless worry, or false reassurance, starts.
Why does a fibroid's location matter so much?
Doctors classify fibroids by where they sit compared to your uterine cavity: submucosal (bulging into the cavity), intramural (inside the muscle wall), and subserosal (on the outer surface). This isn't just medical bookkeeping. It's the single biggest factor in whether a fibroid affects your fertility at all.
Subserosal fibroids grow on the outer surface of your uterus. They don't appear to get in the way of fertility, and generally don't need removal to help you conceive. Intramural fibroids grow inside the muscular wall. They're the most common type, and doctors tend to treat these case by case. But the evidence is clear about fibroids that distort the shape of your cavity. These should be surgically removed to improve your chances, even if they cause no symptoms at all. That's because a distorted cavity gets in the way of the space an embryo needs to implant and grow.
What does the evidence say about removing submucosal fibroids?
Submucosal fibroids sit closest to, or bulge into, your uterine cavity. That's exactly why they have the strongest evidence for removal. Fair-quality evidence shows that removing them through a minor procedure (hysteroscopy) improves pregnancy rates. In one study, women who had these fibroids removed had a 43.3% pregnancy rate after one year, compared with 27.2% in women whose fibroids were left alone.
But it's worth being precise about what this evidence does and doesn't show. There isn't yet enough evidence to say that removing submucosal fibroids also lowers the chance of early miscarriage. So the honest summary is this: removal is well-supported for improving your odds of getting pregnant in the first place. Whether it protects against early pregnancy loss once you are pregnant is a separate question. The evidence doesn't answer that one yet.
How can a polyp get in the way of pregnancy?
Polyps can work against fertility in a couple of ways. One is simple and physical: a polyp can get in the way of a fertilized egg trying to implant, just by taking up space or disrupting the surface the embryo needs to attach to.
The other way is more hidden. Research found that a uterus with polyps has much lower levels of two genes (HOXA10 and HOXA11) that your uterine lining needs to become ready for an embryo. This may hurt implantation even beyond whatever physical blocking the polyp causes. This helps explain why polyps show up so often during fertility workups. Up to 25% of women being evaluated for unexplained infertility are found to have polyps. When doctors can't otherwise explain infertility, a polyp is a genuinely common answer.
Does every polyp need to be removed?
Unlike fibroids that distort your cavity, polyps aren't an automatic "remove it" situation. About one in four polyps go away on their own within a year, especially smaller ones. So finding a small polyp on an ultrasound isn't necessarily a surgery conversation. It may just mean watching and rechecking later.
The evidence gets more direct once you're actively going through fertility treatment. The same research that found the gene changes also concluded something else. If a polyp is found, removing it before starting fertility treatment is a reasonable, recommended step, because it may improve your fertility. And once removed, that's usually the end of the story. Polyps rarely come back after surgery.
Frequently asked questions
Do all fibroids need to be removed before I start trying to conceive?
No. Where a fibroid sits matters far more than whether it exists at all. Research reviewed in StatPearls indicates subserosal fibroids, which grow on the outer surface of the uterus, do not appear to impair fertility. They generally don't need to be removed to improve reproductive outcomes. Intramural fibroids, which grow within the muscular wall, are actually the most common type of uterine fibroid, and many are managed case by case. It's submucosal fibroids, and any fibroid distorting the uterine cavity, that carry the clearest evidence for removal.
If a fibroid isn't distorting my cavity and isn't causing symptoms, should I still worry about it?
The evidence summarized in StatPearls is specifically about cavity-distorting fibroids. Those should be surgically removed to improve reproductive outcomes even without symptoms, because their location directly affects the space an embryo needs to implant. A fibroid that isn't distorting the cavity is a different situation. It's worth discussing with your doctor whether its size, number, or exact location changes that picture for you.
Will removing a fibroid lower my risk of miscarriage?
This is one area where the evidence is more limited. ASRM's practice guideline notes fair (Grade B) evidence that hysteroscopic removal of submucosal fibroids improves clinical pregnancy rates. But the organization states there is currently insufficient evidence to conclude that removal also lowers the chance of early pregnancy loss. The improved pregnancy rate and reduced miscarriage risk are not the same claim. It's worth being clear-eyed about that distinction.
Can a polyp go away without surgery?
Sometimes, yes. According to Cleveland Clinic, not every uterine polyp requires removal: about one in four resolve on their own within a year, especially smaller ones. That said, when a polyp is identified during an infertility workup, research published in PMC/NIH found something else. Removing it via hysteroscopic polypectomy before starting infertility treatment is a reasonable and recommended step, because it may improve fertility. Polyps also rarely recur once they're surgically removed.
How would I even find out if I have a fibroid or a polyp?
Both are frequently found during infertility evaluation rather than because they're causing obvious symptoms. In fact, up to 25% of women being evaluated for unexplained infertility are found to have endometrial polyps on hysteroscopy. This is according to research published in PMC/NIH. If you're actively trying to conceive and haven't had your uterine cavity imaged, that's a reasonable question to bring to your provider.
Sources
- ASRM's practice guideline concludes there is fair (Grade B) evidence that hysteroscopic removal of submucosal fibroids improves clinical pregnancy rates. — ASRM
- In a study cited by ASRM, women who had submucosal fibroids surgically removed had a 43.3% clinical pregnancy rate at one year of follow-up, compared with 27.2% in women whose fibroids were left untreated. — ASRM
- ASRM states there is currently insufficient evidence to conclude that hysteroscopic removal of submucosal fibroids lowers the chance of early pregnancy loss. — ASRM
- Fibroids are classified by location relative to the uterine cavity: submucosal (FIGO types 0-2), intramural (FIGO 3-5), and subserosal (FIGO 6-7), a distinction that determines how much they affect fertility. — StatPearls/NCBI
- Research reviewed in StatPearls indicates subserosal fibroids do not appear to impair fertility and generally do not need to be removed to improve reproductive outcomes. — StatPearls/NCBI
- Cavity-distorting fibroids should be surgically removed to improve reproductive outcomes even when they are not causing any symptoms, according to the evidence summarized in StatPearls. — StatPearls/NCBI
- Intramural fibroids, which grow within the muscular wall of the uterus rather than the cavity or outer surface, are the most common type of uterine fibroid. — Cleveland Clinic
- Peer-reviewed research found that uteri containing endometrial polyps show a marked decrease in HOXA10 and HOXA11 mRNA levels, genes needed for the uterine lining to become receptive to an embryo, which may impair implantation. — PMC/NIH
- The same peer-reviewed study concluded that when an endometrial polyp is identified, removing it via hysteroscopic polypectomy before starting infertility treatment is a reasonable and recommended step because it may improve fertility. — PMC/NIH
- Up to 25% of women being evaluated for unexplained infertility are found to have endometrial polyps on hysteroscopy. — PMC/NIH
- Not every uterine polyp requires surgical removal: about one in four polyps resolve on their own within a year, especially smaller ones, and polyps rarely recur after they are surgically removed. — Cleveland Clinic
- Uterine polyps can physically interfere with a fertilized egg's ability to implant in the uterus. — Cleveland Clinic
Educational information, not medical advice — always consult your doctor.