By the Incinta Editorial Team · Medically reviewed by the Incinta Review Team
Few findings change the tone of a fertility conversation as quickly as the words “you have fibroids.” Yet the science is both more reassuring and more nuanced than that phrase suggests: uterine fibroids are the most common benign tumors in women of reproductive age, the large majority never interfere with pregnancy, and people with fibroids conceive naturally every day. What the research consistently shows is that location is what matters—a fibroid pressing into the uterine cavity is a very different problem from one bulging harmlessly on the outer surface. This guide walks through what fibroids are, when they genuinely affect fertility and miscarriage risk, which treatments protect fertility (and which deserve caution), and what a complete evaluation looks like for people in Torrance and the South Bay—with published sources, honest caveats, and no scare tactics.
1. Fibroids Are Extremely Common—and Usually Not the Villain
Start with the epidemiology, because it reframes everything that follows. According to the NIH’s NICHD, uterine fibroids are the most common non-cancerous tumors of the reproductive tract, and prevalence research frequently cited by NIH suggests that the majority of women develop at least one fibroid by age 50—figures as high as 70–80% by menopause appear across published studies. Many of these are never diagnosed, because fibroids are often silent: they grow, sit there, and cause no symptoms at all. If you have just been told you have a fibroid, you are statistically in very large company.
Here is the part that deserves equal weight: most fibroids do not impair fertility, and discovering one during a workup is far from a diagnosis of infertility. The clinically useful question is never “are there fibroids?”—in a woman of thirty-five or older, the answer is usually yes or probably yes. The useful question is “is this fibroid, in this location, a plausible contributor to this couple’s difficulty conceiving?” Answering it requires mapping the uterus properly, weighing the rest of the workup, and knowing where the evidence is strong versus where it is genuinely uncertain. That is what the rest of this guide is for.
2. What Fibroids Are—and Who Gets Them
Fibroids—medical names include leiomyomas and myomas—are growths of smooth muscle cells and fibrous tissue that arise within the muscular wall of the uterus. They are almost always benign: transformation into a cancer (leiomyosarcoma) is exceedingly rare, and the rapid growth or postmenopausal enlargement that raises suspicion is precisely why imaging follow-up exists. Fibroids are hormone-responsive—estrogen and progesterone fuel their growth—which explains their behavior: they develop during the reproductive years, can enlarge in pregnancy, and typically shrink after menopause. MedlinePlus notes that each pregnancy lowers lifetime fibroid risk, and that long-term hormonal contraception is also associated with lower risk.
Who is most likely to have them? The consistent risk factors in NICHD and MedlinePlus materials are: age (rates climb through the thirties and forties), race and ethnicity—Black and African American women develop fibroids at younger ages and more often have larger fibroids with heavier symptoms—family history (a mother or sister with fibroids roughly doubles the likelihood in commonly cited estimates), obesity, vitamin D deficiency, starting periods before age 10, and never having been pregnant. A note on intellectual honesty: most of these are associations from observational research—they describe who shows up in the data, not a guarantee about any individual. None of them is a lifestyle verdict; they are reasons to look once with ultrasound if fertility timing matters to you.
3. Location, Location, Location: The Types That Matter for Fertility
Fibroids are classified by where they sit relative to the uterine wall, and the vocabulary is worth learning because everything else—symptoms, treatment, fertility impact—follows from it. Submucosal fibroids grow just under the uterine lining and bulge into or within the cavity where an embryo must implant. Intramural fibroids—the most common type—grow inside the muscular wall itself. Subserosal fibroids grow on the outer surface of the uterus, and pedunculated fibroids hang off the uterus on a stalk, either outward or into the cavity. Specialists also use the FIGO classification (types 0–8) to describe precisely how much of a fibroid sits inside the cavity versus the wall—you may see this on a radiology report, and it matters for surgical planning.
The single most decisive question a fertility specialist asks is: does this fibroid distort or disturb the uterine cavity? A submucosal fibroid is treated as a genuine fertility concern at essentially any size, because the embryo has to implant against it. A large intramural fibroid that pushes into the cavity concerns physicians too. An intramural fibroid that leaves the cavity smooth is a middle zone where the evidence is genuinely mixed (Section 4). And a small subserosal fibroid on the outer wall is, for conception purposes, usually an innocent bystander. This is why serious evaluation starts with mapping the cavity, not just measuring the fibroid—a distinction that changes treatment decisions more than any millimeter count.
4. How Fibroids Can Interfere With Getting Pregnant
The mechanisms are anatomical and increasingly well understood. A fibroid that distorts the cavity changes the terrain an embryo must traverse and implant into—studies consistently show lower implantation and pregnancy rates when the cavity is distorted. Fibroids can also alter endometrial blood flow and receptivity in the overlying lining, and occasionally a large fibroid compresses a fallopian tube (an uncommon but real effect—our tubal factor guide explains what tubal assessment involves). Local inflammation within the lining is another proposed pathway.
Now the numbers, with their proper framing. In its Committee Opinion on fibroids and infertility, the American Society for Reproductive Medicine (ASRM) describes fibroids as present in roughly 5–10% of people being evaluated for infertility, while being the sole barrier to conception in only about 2–3% of cases. The evidence is strongest and most consistent for submucosal fibroids: their removal by hysteroscopy is associated with improved reproductive outcomes, which is why that surgery is broadly accepted as worthwhile (Section 9). For intramural fibroids that do not distort the cavity, the literature is genuinely mixed—some analyses find small effects for larger fibroids (commonly discussed at around 4 cm and above), others find none—and ASRM is candid that the benefit of removing them is unproven. The honest summary: most fibroids found during a fertility workup are bystanders; a minority—chiefly cavity-distorting ones—are real, and treatable, obstacles. Which is which is exactly what proper mapping determines.
5. Symptoms—and the Truth That Most Fibroids Are Silent
When fibroids do speak up, they do so in characteristic ways. The most common symptoms in ACOG and MedlinePlus patient materials: heavy or prolonged menstrual bleeding (sometimes with clotting, sometimes severe enough to cause iron-deficiency anemia), bleeding between periods, a feeling of fullness or pressure in the lower abdomen, urinating frequently (a fibroid pressing on the bladder), pain during intercourse, and low back pain. Which symptoms appear—and how intensely—depends on a fibroid’s size, number, and above all location, which is why two people with “the same fibroid” on paper can have completely different experiences.
But here is the fact that matters most for readers trying to conceive: many fibroids cause no symptoms whatsoever and are discovered incidentally—on a routine pelvic exam, an ultrasound done for another reason, or the transvaginal ultrasound that begins a fertility workup. Silence is not reassurance, and noise is not necessarily danger: a heavily symptomatic surface fibroid can be irrelevant to fertility, while a quiet 2 cm submucosal one can matter. The practical takeaway is not to interpret your own symptoms (or lack of them), but to get imaging that maps the cavity whenever fibroids are known or suspected—particularly if you are also facing the age-based evaluation timelines described in our age and fertility guide.
6. Diagnosing Fibroids in Torrance: What the Workup Looks Like
The diagnostic ladder is short, outpatient, and mostly painless. It starts with transvaginal ultrasound—the standard, well-tolerated tool that ACOG describes as the usual method for detecting and measuring fibroids. When fibroids are found, the pivotal second step is often saline infusion sonohysterography (SIS)—a small amount of sterile saline placed into the cavity during ultrasound so the lining stands out in crisp relief. SIS is how physicians answer the question from Section 3: is the cavity distorted, and how much of the fibroid sits within it? For large, numerous, or unusually positioned fibroids, pelvic MRI may be added to map anatomy before surgery. Hysteroscopy—a thin camera passed through the cervix into the cavity—serves as both the final diagnostic word and, when needed, the treatment itself.
One framing point keeps this all in proportion: fibroid evaluation is one chapter of a complete fertility workup, not the whole book. A proper first evaluation also includes ovarian reserve testing (our AMH guide explains it), ovulation assessment, a semen analysis for the male partner from the start—our male infertility and ICSI guide covers what it measures—and tubal assessment. Finding a fibroid on ultrasound is a reason to characterize it carefully, not a license to declare the case closed before the rest of the evaluation is done. Couples who resist that temptation avoid the single most common diagnostic trap: treating a bystander as the answer.
7. Fibroids and Miscarriage: What the Evidence Supports
The miscarriage question deserves precision, because it is where online advice most often overreaches in both directions. What the evidence supports: fibroids that distort the cavity—especially submucosal ones—are associated with an increased risk of miscarriage, with published meta-analyses reporting roughly a doubling of risk compared with a normal cavity, and clinical series associating hysteroscopic removal of these fibroids with lower subsequent loss rates. The proposed mechanism is the same as the implantation mechanism in Section 4: a disturbed cavity is a hostile terrain in early pregnancy, whether the pregnancy is conceived naturally or through IVF.
The equally important caution: most early miscarriages are chromosome errors in the embryo, not anatomy problems—a point our recurrent pregnancy loss guide treats in depth. A single early loss in a person with one small, non-distorting intramural fibroid is, statistically, far more likely to be a chance chromosomal event than a fibroid problem, and removing such a fibroid would not have prevented it. The evidence-based rule of thumb: when recurrent loss is the presenting problem, the workup includes uterine cavity assessment (SIS, 3D ultrasound, or hysteroscopy) precisely because cavity-distorting fibroids are one of the treatable causes on the list—but a fibroid found incidentally should never be blamed for a loss it almost certainly did not cause.
8. Not Every Fibroid Needs Treatment: The Case for Watchful Waiting
The default instinct after any diagnosis is “remove it.” With fibroids, the evidence often counsels patience instead. For small, asymptomatic intramural or subserosal fibroids that do not distort the cavity, ASRM’s guidance supports observation as a reasonable, evidence-consistent choice—because, as Section 4 showed, the reproductive benefit of removing non-distorting fibroids is unproven, while every surgery carries real costs. Fibroids are not ticking time bombs; most grow slowly, and the menopause horizon eventually dissolves the problem on its own.
Those “real costs” deserve specifics, because they are routinely minimized in marketing materials. Myomectomy carries operative risks—bleeding requiring transfusion in a minority of cases, infection, and adhesions (scar tissue) that can themselves impair tubal function or ovarian access. Deep removal from the uterine wall creates a surgical scar that matters in a future pregnancy: physicians typically advise a waiting period before conception and, for some deep repairs, modified delivery planning, because uterine rupture during labor, while rare, is among the most serious pregnancy complications. Recovery consumes weeks of a timeline that may be age-pressured. None of this means avoiding needed surgery—it means the decision should turn on one question: is this specific fibroid plausibly impairing reproduction? The goal is a live baby, not a spotless ultrasound report.
9. Myomectomy: The Fertility-Preserving Operation
When a fibroid does warrant removal and fertility is the goal, the operation is a myomectomy—removing the fibroid while leaving the uterus in place—and it comes in three routes selected by fibroid location and size. Hysteroscopic myomectomy: for submucosal fibroids reachable through the cervix; no abdominal incisions at all, usually outpatient, and the approach with the clearest evidence of improving fertility outcomes for cavity-distorting fibroids. Laparoscopic or robotic myomectomy: through several small abdominal incisions, for selected intramural and subserosal fibroids, with faster recovery than open surgery. Open (abdominal) myomectomy: for large, multiple, or deeply seated fibroids where the wall must be repaired in layers—the most involved recovery, but sometimes the right choice for complex anatomy.
Timing and healing, honestly stated. Typical published guidance is that hysteroscopic recovery runs days to about two weeks, while abdominal approaches take several weeks of activity restriction. After deep-wall removal, physicians commonly advise waiting roughly 3–6 months before attempting conception to let the uterine wall heal—a typical range from general practice, individualized by the depth and extent of the repair; after hysteroscopic removal the interval is usually shorter. Surgeons experienced in fertility-focused myomectomy use techniques and adhesion barriers to minimize scar tissue formation, and many recommend post-operative imaging to confirm healing before treatment resumes. Two questions worth asking any surgeon: how many fertility-motivated myomectomies do you perform, and what is your plan for preventing adhesions? The answers separate fertility-fluent operators from generalists—and both questions belong in a written plan, not a hallway conversation.
10. Medications: Managing Symptoms, Not Making Embryos
Fibroid medications have a role in fertility care, but a narrower one than advertisements imply—and the distinction matters. GnRH agonists and antagonists (including the newer oral antagonists) temporarily shrink fibroids and are used to ease heavy bleeding, correct anemia before surgery, or bridge patients toward an operation. They are not a fertility treatment: fibroids regrow after the medication stops, and these drugs are not used while actively trying to conceive. Hormonal contraceptives, hormonal IUDs, and tranexamic acid manage bleeding effectively—and are by definition incompatible with conception attempts (the IUD and contraception prevent pregnancy; tranexamic acid is stopped before trying).
The honest bottom line: there is no pill that makes a cavity-distorting fibroid fertility-friendly. Medication buys comfort, corrects anemia, and buys time—legitimate goals when surgery must be delayed or when bleeding, not fertility, is the complaint. But when the problem is anatomy, the fix is anatomical. If you are offered medication as the plan for a fibroid that maps into the cavity while you are trying to conceive, the follow-up question is simple and worth asking out loud: what is the plan for the cavity itself?
11. Uterine Artery Embolization: A Treatment That Deserves a Careful Conversation
You will encounter uterine artery embolization (UAE)—also called uterine fibroid embolization—in any search about fibroid treatment, so it deserves an honest paragraph here. The procedure: an interventional radiologist threads a catheter and blocks the arteries feeding the fibroid, shrinking it. For symptom control in people whose childbearing is complete, it is a well-established, less invasive alternative to surgery, and for many patients an excellent one.
For people who want to become pregnant, the conversation is different, and the caution is explicit in ASRM and ACOG materials. The evidence on fertility after UAE is limited and mixed: the embolization process cannot reliably spare normal uterine and ovarian blood supply, there are concerns about effects on ovarian reserve and endometrial healing, and studies that have followed pregnancies after UAE report higher rates of complications—such as malpresentation and preterm delivery—compared with pregnancies after myomectomy in some series. For these reasons, embolization is generally not the standard recommendation when future fertility is the priority; it is occasionally considered in specific, individualized circumstances after a full discussion. If UAE is proposed to you while you are planning pregnancy, the questions that matter: what happens to ovarian blood supply, what does the evidence say about pregnancy after this procedure, and why is myomectomy not the alternative being offered?
12. Fibroids and IVF: Why Sequencing Matters
A frequent and understandable question: “if I need IVF anyway, should the fibroid just be left alone?” The answer follows from what IVF does and does not do. IVF—described fully in our complete IVF guide and our step-by-step IVF journey guide—produces embryos in the laboratory. But every embryo, however excellent, still has to implant in your uterus. IVF does not compensate for a cavity that an embryo cannot implant into, which is why the standard teaching is to fix the anatomy first: remove a cavity-distorting fibroid, allow healing, and then proceed—the sequencing question our IUI vs. IVF comparison also touches for couples weighing lower-tech options.
When does IVF become the reasonable path alongside fibroids? The usual reasons are the same ones that drive IVF decisions generally: age-pressured timelines (where each month matters and IVF’s efficiency earns its cost—see our age and fertility guide), coexisting factors such as male-factor infertility or endometriosis (our endometriosis guide covers that interaction), or documented failure of less invasive steps. Myomectomy and IVF are not rivals but sequenced steps in one plan—surgery, healing, stimulation, retrieval, transfer. One clarifying note: embryo chromosome screening with PGT-A addresses a different problem (age-driven aneuploidy, not anatomy) and neither fixes nor replaces cavity repair. The plan that works is written as a sequence, not a menu.
13. Protecting Ovarian Reserve and Tubal Health During Fibroid Care
There is a quieter long-game consideration in fibroid treatment that rarely makes patient handouts: surgery itself can touch the neighborhood. Fibroids sit beside, behind, or within millimeters of the fallopian tubes and ovaries, and any pelvic operation—especially open or laparoscopic myomectomy—can produce adhesions that glue these structures down or impair how a tube picks up an egg, converting today’s fibroid problem into tomorrow’s tubal one (the mechanisms are described in our tubal factor guide). Operations near an ovary can also, in selected cases, nudge ovarian reserve downward.
This is not an argument against surgery—needed surgery is still the right call—it is an argument for deliberateness. The protective playbook is straightforward: get a baseline AMH before any operation so there is a reference point afterward (our AMH and ovarian reserve guide explains what the test does and does not tell you); confirm the cavity has been properly mapped (SIS) so the approach is chosen for the right reasons; ask the surgeon directly about adhesion-prevention technique; and schedule post-operative follow-up imaging to confirm the tubes and ovaries remain accessible before treatment resumes. Patients who ask these questions tend to end up with both problems solved—the fibroid and the fertility—rather than trading one for the other.
14. Living With Fibroids While Trying to Conceive—and Your Next Step
A few practical notes for the weeks and months a workup and treatment plan actually occupy. If periods are heavy, take iron status seriously—iron-deficiency anemia drains energy and is worth correcting under a physician’s guidance; this is one of the most under-treated aspects of living with fibroids. General health measures with real (if modest) evidence behind them: keeping body weight in a healthy range, sensible exercise, checking vitamin D (deficiency is associated with fibroid risk in observational studies), and quitting smoking—which no fertility plan ever loses points for. The emotional load is real too: chronic symptoms plus conception stress is a heavy combination, and support—from counseling to peer groups—deserves a place in the plan itself; our series is preparing a dedicated guide to fertility psychological support.
And when you are ready to trade search results for specifics, the path is one consultation and a handful of outpatient tests: a both-partner evaluation, a transvaginal ultrasound with SIS mapping of the cavity, and—if a fibroid needs attention—a written plan that states which type it is, why a given treatment fits it, what the alternatives are, and how the timeline coordinates with everything else the workup found. You can request a consultation with our Torrance fertility team here, where fibroid findings are put in the context of the whole picture—reserve, ovulation, tubes, and the male partner—rather than treated as a free-standing verdict.
15. Frequently Asked Questions
Can uterine fibroids prevent you from getting pregnant?
Usually not. Most fibroids do not impair fertility, and ASRM describes them as the sole cause of infertility in only about 2–3% of cases. The types most likely to matter are submucosal or cavity-distorting fibroids—the ones an embryo must implant against. Many people with fibroids conceive naturally without ever knowing they had them.
What size fibroid is a problem for fertility?
There is no single magic number—location matters more than size. Even a small submucosal fibroid warrants attention, while larger surface fibroids are often irrelevant to conception. For intramural fibroids that do not distort the cavity, the evidence is mixed, with some physicians becoming more concerned at around 4 cm and above. Proper cavity mapping (SIS) answers this better than any measurement alone.
Should fibroids be removed before IVF?
For submucosal or cavity-distorting fibroids, removal before IVF is broadly accepted, because IVF cannot compensate for a cavity an embryo cannot implant into. For intramural fibroids that leave the cavity undistorted, the benefit of prior removal is unproven and the decision is individualized—weighing age, fibroid size, and surgical risk. This sequencing conversation belongs with a fertility specialist before cycles begin.
How long after a myomectomy should I wait before trying to conceive?
Commonly published guidance suggests roughly 3–6 months after removal of deep intramural fibroids, to let the uterine wall heal; hysteroscopic removal of submucosal fibroids usually allows a shorter interval. The right timing depends on the depth and extent of the repair and should be set by your surgeon in writing—these are typical ranges from general practice, not a rule for every case.
Do fibroids come back after myomectomy?
They can. Published series commonly place recurrence somewhere in the 15–30% range over several years, higher with longer follow-up and in younger patients, since the underlying tendency is hormonal. Recurrence does not automatically threaten fertility—the location and symptoms of any new fibroid are what matter, which is why periodic follow-up imaging is sensible during the trying-to-conceive years.
Can fibroids cause miscarriage?
Cavity-distorting and submucosal fibroids are associated with an increased miscarriage risk—roughly a doubling in published pooled analyses. But most early miscarriages are chromosome errors in the embryo, and an incidental fibroid should not be blamed for a loss it likely did not cause. After two or more losses, the dedicated evaluation in our recurrent pregnancy loss guide—which includes uterine cavity assessment—is the evidence-based next step.
Have fibroids been found on an ultrasound—or are your periods heavy and your timeline pressing? Schedule a consultation with our fertility specialists in Torrance for both-partner evaluation, saline-mapping of the uterine cavity, and a written plan that puts any fibroid finding in the context of the whole picture.
Incinta Fertility Center — Fertility Clinic Torrance & South Bay, California. Patient-first care, bilingual support, and laboratory leadership you can trust.
