Surgery + ART Maximizes Pregnancy Outcomes in Bowel Endometriosis

Surgery Plus ART Outperforms Standalone Strategies in Bowel Endometriosis–Associated Infertility

Key Points

Highlights:

• Combined strategy (surgery + ART) achieves the highest cumulative pregnancy rates in bowel endometriosis.
• First-line ART alone does not outperform expectant management in selected patients.

Importance:

• Management of bowel endometriosis–associated infertility remains non-standardized and controversial.
• This meta-analysis challenges the “either surgery or ART” paradigm and supports a tailored, sequential approach.

What's Done Here?

• Systematic review and meta-analysis of 48 studies including 5,963 patients with bowel endometriosis.
• Compared cumulative pregnancy rates across expectant management, first-line ART, and primary surgery ± ART.

Key Results:

• Expectant management: 36% cumulative pregnancy rate, First-line ART: 40%; not clearly superior to expectant approach
• After primary surgery: Overall pregnancy rate: 56% and Spontaneous pregnancy: 29%.
• However, ART after surgery: 56%, furthermore in confirmed infertility, spontaneous pregnancy after surgery drops to 24%.

Strengths and Limitations:

• Strengths are: large pooled cohort with nearly 6,000 patients; first meta-analysis to include expectant management as a comparator; and stratified analysis by treatment pathway.
• Limitations are: high heterogeneity across studies (design, populations, interventions; predominantly observational data; lack of randomized trials; poor differentiation between proven infertility vs. desire to conceive.

From the Editor-in-Chief – EndoNews

"This meta-analysis reframes a long-standing clinical dilemma by demonstrating that fertility outcomes in bowel endometriosis are not driven by a single superior intervention, but by how treatments are sequenced. The comparable outcomes between expectant management and first-line ART in selected populations highlight the heterogeneity of reproductive potential and the limitations of applying uniform strategies. In contrast, the consistent signal favoring surgery followed by ART suggests that surgical intervention may modify the disease environment in a way that enhances subsequent reproductive efficiency, rather than acting as a standalone fertility solution.

Importantly, the marked decline in spontaneous pregnancy rates among women with confirmed infertility underscores that patient selection—not intervention choice alone—determines success. The high heterogeneity across studies further reflects the biological and clinical complexity of bowel endometriosis, where lesion burden, coexisting pelvic pathology, and prior treatments all influence reproductive outcomes.

These findings reinforce that endometriosis care cannot be standardized. Optimal management requires a personalized, multimodal, and multidisciplinary approach, integrating surgical expertise, reproductive medicine, and patient-specific factors to guide decision-making.

Taken together, this study moves the field beyond binary thinking and toward integrated care pathways.
The future of fertility management in bowel endometriosis lies not in choosing between modalities, but in aligning them within personalized, multidisciplinary strategies."

Lay Summary

A new study published in the Journal of Minimally Invasive Gynecology by Larraín et al. from Santiago, Chile, examined how different treatment strategies affect pregnancy chances in women with bowel endometriosis who wish to conceive.

Analyzing data from nearly 6,000 patients, the authors found that no single approach works best for all patients.

While some women were able to conceive naturally or with assisted reproduction alone, the highest pregnancy rates were observed when surgery was followed by medically assisted reproduction.

Interestingly, first-line assisted reproduction alone did not clearly improve pregnancy outcomes compared to expectant management in selected patients.

In contrast, surgery appeared to enhance overall fertility outcomes, particularly when combined with assisted reproductive techniques.

However, spontaneous pregnancy rates after surgery significantly dropped in women with confirmed infertility.

Overall, the findings suggest that treatment decisions should not be reduced to a simple choice between surgery or assisted reproduction.

Instead, a personalized, stepwise approach—tailored to the patient’s age, symptoms, and fertility history—may offer the best chance of achieving pregnancy.

Research Source: https://pubmed.ncbi.nlm.nih.gov/41380833/