Fertility & conception

A Fibroid Turned Up on Ultrasound: Now What?

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A fibroid found while trying to conceive often needs no treatment, and its location matters more than its size. Fibroids bulging into the uterine cavity can lower the odds of conception and are the most likely to be removed, while fibroids in the outer wall are frequently watched. A gynecologist can guide the watch-versus-treat decision.

Last updated: July 2026

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Do fibroids make it harder to get pregnant?

Fibroids affect fertility mainly when they distort the cavity where an embryo would implant. Most fibroids do not, and plenty of people conceive with them in place. Fibroids are very common — up to 80% of women develop at least one by age 50, according to the Office on Women's Health 1 — so finding one during a fertility workup is often incidental.

Submucosal fibroids, which bulge into the uterine cavity, are the type most consistently linked to lower conception and higher miscarriage rates 2. Fibroids sitting in the outer wall (subserosal) or deep in the muscle (intramural) usually have less effect. Knowing how long conception normally takes helps put a single finding in context.

Why does the fibroid's location matter most?

Location shapes a fibroid's impact far more than size alone. A small submucosal fibroid distorting the cavity can matter more than a large subserosal one on the outside of the uterus. Clinicians classify fibroids by where they sit, and that internal map guides the treatment decision.

According to ACOG, submucosal and cavity-distorting fibroids are the ones for which removal most clearly improves fertility outcomes 2. Imaging such as a saline-infusion sonogram or an MRI can show the exact position when a standard ultrasound is unclear. A comparative effectiveness review from AHRQ found the evidence strongest for treating fibroids that involve the cavity and weaker for routinely removing others before conception 3.

Should you treat a fibroid before trying, or wait?

Watching is often reasonable when a fibroid sits outside the cavity and is not causing heavy bleeding or pain. Removal, usually a myomectomy, tends to be considered when a fibroid distorts the cavity, when bleeding is heavy, or after otherwise-unexplained infertility or pregnancy loss 2.

Surgery has trade-offs, including recovery time and, depending on the technique, a wait before trying and sometimes a recommendation for cesarean birth. Medications that shrink fibroids by lowering estrogen are generally used short-term and are not a path to pregnancy, since they suppress ovulation 3. Around 1 in 3 women with fibroids has symptoms like heavy periods that factor into the decision 1, and weighing female infertility causes alongside the fibroid helps avoid pinning everything on it.

How do fibroids behave during pregnancy?

Fibroids can grow during pregnancy under the influence of higher hormone levels, though many stay stable. Most pregnancies with fibroids proceed normally, but larger or cavity-distorting ones carry somewhat higher chances of pain, malposition of the baby, or cesarean birth 2.

Fibroids are unusual before the reproductive years and tend to shrink after menopause, when estrogen falls, so a fibroid found in your thirties or forties may need less aggressive treatment if menopause is near 1. During the perimenopausal transition, fluctuating hormones can temporarily worsen fibroid-related bleeding 3. Understanding fibroid symptoms and treatment options helps you anticipate changes across these stages.

When a fibroid found during conception needs a gynecologist

A gynecologist can map a fibroid's size and location and translate that into a watch-or-treat plan tailored to your fertility timeline. Reasons to seek that review include heavy periods soaking through protection, pelvic pressure or pain, a fibroid known to distort the cavity, or several months of trying without success.

If conception has not happened after about 12 months under age 35, or 6 months at 35 or older, a fertility evaluation is reasonable and may clarify the fibroid's role, according to the American Society for Reproductive Medicine 4. Knowing when to see a fertility specialist can help you time that step. Gale can help you organize your imaging and questions beforehand.

Common questions

Usually, yes. Most fibroids do not prevent pregnancy, and many people conceive with them in place. The main exception is a fibroid that distorts the uterine cavity, which can lower the odds. A gynecologist can tell you which type you have and whether it is likely to matter.

Most fibroids do not raise miscarriage risk meaningfully. Submucosal fibroids that bulge into the cavity are the ones more consistently linked to loss. If you have had a miscarriage and a cavity-distorting fibroid, that combination is worth reviewing with your clinician.

Often not. Removal is usually reserved for fibroids that distort the cavity, cause heavy bleeding, or accompany unexplained infertility or loss. Fibroids in the outer wall are frequently left alone. The decision depends on location, symptoms, and your fertility timeline.

It might. Higher pregnancy hormone levels can make fibroids grow, though many stay the same. Most pregnancies with fibroids go well; larger ones carry a somewhat higher chance of pain or cesarean birth. Your care team can monitor a fibroid as pregnancy progresses.

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When a fibroid needs prompt attention

  • —Heavy bleeding soaking through a pad or tampon every hour for several hours is a reason to seek urgent care.
  • —Severe, sudden pelvic pain, which can signal a degenerating fibroid, is a reason to contact your clinician promptly.
  • —Dizziness, fainting, or a racing heart alongside heavy periods can signal anemia and is a reason to seek medical review.
  • —New difficulty emptying your bladder or bowels from pelvic pressure is a reason to arrange a gynecology visit.

This article is general health education, not medical advice. Whether a fibroid needs treatment before pregnancy depends on its size, location, and your symptoms, and is best decided with a gynecologist.

References

  1. 1.Office on Women's Health (U.S. HHS) (2025). Uterine fibroids. Office on Women's Health (womenshealth.gov), U.S. HHS. link ✓Uterine fibroids are common (up to 80% of women by age 50), most are asymptomatic, roughly a third cause symptoms such as heavy periods, and fibroids tend to shrink after menopause.
  2. 2.American College of Obstetricians and Gynecologists (2021). Management of Symptomatic Uterine Leiomyomas: ACOG Practice Bulletin, Number 228. Obstetrics & Gynecology. doi:10.1097/AOG.0000000000004401 ✓Submucosal and cavity-distorting fibroids are most associated with reduced fertility and pregnancy complications, and are the fibroids for which removal most clearly improves outcomes.
  3. 3.Hartmann KE, Fonnesbeck C, Surawicz T, Krishnaswami S, Andrews JC, Wilson JE, Velez-Edwards D, Kugley S, Sathe NA (2017). Management of Uterine Fibroids (Comparative Effectiveness Review No. 195). Agency for Healthcare Research and Quality (AHRQ). PMID 30789683 ✓Comparative effectiveness evidence: strongest for treating cavity-involving fibroids, weaker for routine removal of others; GnRH-lowering medications shrink fibroids short-term and suppress ovulation.
  4. 4.Practice Committee of the American Society for Reproductive Medicine (2021). Fertility evaluation of infertile women: a committee opinion. Fertility and Sterility. doi:10.1016/j.fertnstert.2021.08.038 ✓Timing of fertility evaluation: after about 12 months of trying under age 35, or 6 months at age 35 or older.

4 sources, numbered by first appearance. General health information, not medical advice. AI-assisted editorial content — every citation independently verified. Editorial policy

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