What are the recommended guidelines for evaluating and managing uterine fibroids in a reproductive‑age woman who is attempting to conceive?

Management of Uterine Fibroids in Women Attempting to Conceive

For reproductive-age women with fibroids attempting to conceive, submucosal fibroids should be removed hysteroscopically, while intramural and subserosal fibroids should generally be left alone unless they are causing significant symptoms, as the evidence for fertility improvement with their removal is insufficient and surgery carries risks. 1, 2

Initial Evaluation and Classification

Fibroid location is the critical determinant of fertility impact and treatment decisions. 3, 2

• Perform transvaginal ultrasound, hysteroscopy, hysterosonography, or MRI to adequately evaluate and classify fibroids, particularly those impinging on the endometrial cavity. 2
• Avoid hysterosalpingogram for fibroid evaluation and classification—it is not appropriate for this purpose. 2
• Document fibroid size, number, and precise location (submucosal, intramural, or subserosal) as this determines both fertility impact and treatment approach. 3, 2

Treatment Recommendations Based on Fibroid Location

Submucosal Fibroids (Distorting the Endometrial Cavity)

These fibroids have the most significant negative impact on fertility and should be removed. 3, 2, 4

• Hysteroscopic myomectomy is the treatment of choice for submucosal fibroids in women desiring pregnancy. 1, 2
• Fibroid size should be <5 cm for hysteroscopic approach, though larger fibroids can be managed with repeat procedures. 2
• Preoperative assessment must include: fibroid size, location within the cavity, degree of cavity invasion, and thickness of residual myometrium to serosa using hysteroscopy combined with transvaginal ultrasound or hysterosonography. 2
• Removal improves conception and pregnancy rates in women with otherwise unexplained infertility. 2
• Submucosal fibroids are associated with a 70% reduction in delivery rate if left untreated. 4

Intramural Fibroids (Not Distorting the Cavity)

The evidence for treating intramural fibroids to improve fertility is weak, and myomectomy should generally be avoided. 1, 2

• Do not perform myomectomy for intramural fibroids with hysteroscopically confirmed intact endometrium in women with otherwise unexplained infertility, regardless of size. 2
• Intramural fibroids reduce delivery rates by approximately 30%, but myomectomy does not clearly improve fertility outcomes. 4, 5
• If the patient has no other fertility options, the benefits of myomectomy must be weighed against surgical risks (adhesions, uterine rupture in pregnancy), and management should be individualized only in this specific circumstance. 2

Subserosal Fibroids

Subserosal fibroids do not impact fertility and should not be removed. 1, 2, 4

• Removal is not recommended as these fibroids have no demonstrated negative effect on conception or pregnancy outcomes. 2

Surgical Approach When Myomectomy Is Indicated

For Submucosal Fibroids

• Hysteroscopic approach is standard, with shorter hospitalization and faster return to activities compared to abdominal approaches. 1

For Intramural/Subserosal Fibroids (If Surgery Pursued)

• Laparoscopic myomectomy is preferred over open myomectomy when technically feasible, offering shorter hospital stays, faster recovery, less postoperative pain, and less febrile morbidity. 1, 2
• Open myomectomy is preferred for multiple fibroids or very large uteri where laparoscopic approach is not feasible. 1
• Use anterior uterine incision to minimize postoperative adhesion formation. 2
• Cumulative pregnancy rates are similar between laparoscopic and minilaparotomy approaches (69% vs 67% for live births). 1, 2
• Combined miscarriage rate after myomectomy is 14%, comparable to the general population. 1

Medical Management

Medical management has no role as stand-alone treatment for fibroids in women attempting to conceive. 2

• Current medical therapies (GnRH agonists/antagonists, ulipristal acetate) suppress ovulation or interfere with endometrial development and implantation. 1, 2
• Ulipristal acetate showed a 41% reduction in fibroid volume in women with submucosal fibroids undergoing IVF, with pregnancy rates similar to matched controls, but this requires further validation. 1
• Medical management may be used preoperatively to reduce fibroid size before surgery, but not as definitive fertility treatment. 1

Alternative Procedures: Not Recommended for Fertility

Uterine Artery Embolization (UAE)

Women seeking future pregnancy should not generally be offered UAE. 2

• Lower pregnancy rates, higher miscarriage rates, and more adverse pregnancy outcomes compared to myomectomy. 2
• Associated with loss of ovarian reserve, especially in older patients. 2
• One retrospective study showed 40.1% spontaneous pregnancy rate at 2 years post-UAE with 81% live birth rate, but this is lower quality evidence. 1

MR-Guided Focused Ultrasound (MRgFUS)

Evidence is limited to case reports, and a randomized trial was terminated due to lack of enrollment. 1

Laparoscopic Uterine Artery Occlusion (LUAO)

No relevant literature supports its use for fertility enhancement. 1

Key Clinical Pitfalls

• Do not remove intramural fibroids solely for fertility purposes—the surgery may cause more harm (adhesions, uterine weakening) than benefit. 2
• Counsel all patients that pregnancy is possible after any uterine-sparing procedure, even if they state no desire for future fertility. 1
• Avoid endometrial ablation in women desiring pregnancy—it is associated with high risk of pregnancy complications. 1
• The ACR guideline panel did not reach consensus on medical management for reproductive dysfunction, indicating controversy in this area. 1

Summary Algorithm

1. Document fibroid location precisely using ultrasound, hysterosonography, or MRI
2. Submucosal fibroids → Hysteroscopic myomectomy (improves fertility)
3. Intramural fibroids not distorting cavity → Observe (surgery not recommended)
4. Subserosal fibroids → Observe (no fertility impact)
5. If surgery needed for intramural/subserosal → Laparoscopic approach preferred
6. Avoid UAE, MRgFUS, and medical management as primary fertility treatments