What are the current evidence‑based guidelines for evaluating and managing uterine fibroids in women seeking conception?

Management of Uterine Fibroids in Women Seeking Conception

For women with infertility and fibroids, surgical myomectomy is the primary treatment option, with the specific approach determined by fibroid location: hysteroscopic resection for submucosal fibroids impinging on the endometrial cavity, and laparoscopic or open myomectomy for intramural or subserosal fibroids only when other causes of infertility have been excluded. 1

Fibroid Location Determines Impact on Fertility

The relationship between fibroids and fertility is primarily determined by anatomic location:

• Submucosal fibroids (those distorting the endometrial cavity) clearly impair fertility and should be removed 2, 3
• Intramural fibroids have unclear or minimal impact on fertility, particularly when the endometrium remains intact 2
• Subserosal fibroids do not appear to affect fertility and removal is not recommended 2

Evaluation Algorithm

Before proceeding with treatment, complete the following assessment:

• Imaging modality selection: Use transvaginal ultrasound combined with hysteroscopy, hysterosonography, or MRI to adequately classify fibroids and assess endometrial cavity involvement 2
• Avoid hysterosalpingogram for fibroid evaluation—it is inadequate for proper classification 2
• For submucosal fibroids specifically: Assess fibroid size (<5 cm preferred), degree of cavity invasion, and thickness of residual myometrium to serosa using combined hysteroscopy and transvaginal ultrasound 2
• Complete infertility workup: Identify and exclude other sources of infertility before attributing reproductive dysfunction solely to fibroids 1

Surgical Management by Fibroid Type

Submucosal Fibroids (Cavity-Distorting)

Hysteroscopic myomectomy is the definitive treatment for submucosal fibroids in women with otherwise unexplained infertility 1, 2:

• Improves conception and pregnancy rates 2
• Optimal for fibroids <5 cm, though larger fibroids can be managed with repeat procedures 2
• Associated with shorter hospitalization and faster recovery compared to abdominal approaches 1
• Critical caveat: High-quality evidence on live birth rates is lacking; two randomized trials showed conflicting results on pregnancy rates, with miscarriage rates of 30-50% reported 1
• Retrospective data suggests 85% pregnancy rates with 65% live birth rates 1

Intramural and Subserosal Fibroids

There is fair evidence to recommend AGAINST myomectomy for intramural fibroids with intact endometrium and otherwise unexplained infertility, regardless of size 2:

• The impact on fertility appears small or nonexistent when endometrium is not involved 2
• If no other fertility options exist, weigh benefits against surgical risks on an individual basis 2
• Subserosal fibroid removal is not recommended 2

When myomectomy is performed for intramural/subserosal fibroids:

• Laparoscopic approach is preferred when technically feasible, offering shorter hospital stays, faster recovery, less postoperative pain, and less febrile morbidity compared to open surgery 2
• Open myomectomy is preferred for multiple fibroids or very large uteri 1
• Use anterior uterine incision to minimize postoperative adhesion formation 2
• Fertility outcomes are equivalent across hysteroscopic, laparoscopic, and open approaches 1
• Realistic expectations: Less than half of patients achieve pregnancy within 3 years post-myomectomy, and of those pregnancies, less than half result in live birth 1
• Risk of uterine rupture in subsequent pregnancy has been reported with both laparoscopic and open approaches 1

Medical Management Limitations

Medical therapy has no role as standalone treatment for fibroids in infertile women 2:

• Current medical therapies (GnRH agonists/antagonists, hormonal contraceptives, progestin-containing IUDs) suppress ovulation, reduce estrogen production, or disrupt endometrial development 1, 2
• These mechanisms interfere with conception and implantation 2
• Exception: GnRH agonists and antagonists may be used for short courses preoperatively to reduce fibroid size before surgery 1
• Ulipristal acetate showed promise in one study (41% fibroid volume reduction with pregnancy rates similar to controls without fibroids in IVF patients), but reproductive outcomes remain inadequately assessed 1

Alternative Procedures: Generally Not Recommended for Fertility

Uterine Artery Embolization (UAE)

Women seeking future pregnancy should NOT generally be offered UAE 2:

• Lower pregnancy rates and higher miscarriage rates compared to myomectomy 2
• More adverse pregnancy outcomes 2
• Associated with loss of ovarian reserve, especially in older patients 2
• One retrospective study showed 29.5-40.1% spontaneous pregnancy rates at 1-2 years post-UAE with 81% live birth rate, but this is lower quality evidence 1

Laparoscopic Uterine Artery Occlusion (LUAO)

• Limited evidence for fertility enhancement 1
• One nonrandomized trial showed comparable pregnancy rates (67% vs 69%), live births (46% vs 50%), and abortion rates (33% vs 34%) compared to UAE 1
• LUAO had fewer post-procedural complications than UAE 1

MR-Guided Focused Ultrasound (MRgFUS)

• Evidence limited to case reports for fertility enhancement 1
• A randomized trial investigating efficacy was terminated due to lack of enrollment 1

Procedures to Absolutely Avoid

• Endometrial ablation: Associated with high risk of pregnancy complications 1
• Hysterectomy: Results in permanent, irreversible infertility 1

ACR Appropriateness Criteria Summary

According to the 2024 ACR guidelines, laparoscopic or open myomectomy, medical management, MRgFUS, or UAE are considered "usually appropriate" as equivalent alternatives for reproductive-age patients with fibroids desiring pregnancy and experiencing symptomatic reproductive dysfunction 1. However, this recommendation must be interpreted in context with the stronger evidence against UAE for fertility preservation 2 and the lack of standalone medical therapy efficacy 2.

Key Clinical Pitfalls

• Do not remove subserosal fibroids in infertility patients—they don't impact fertility and surgery introduces unnecessary risks 2
• Do not routinely remove intramural fibroids with intact endometrium unless all other infertility causes are excluded and patient has no other options 2
• Counsel all patients that pregnancy is possible after any myomectomy approach, and contraception is needed if pregnancy is not desired 1
• Set realistic expectations: Even with appropriate surgical management, pregnancy rates are modest and live birth rates are lower than pregnancy rates 1
• Consider uterine rupture risk in subsequent pregnancies after myomectomy, particularly with laparoscopic or open approaches 1