OBJECTIVE: To compare the efficacy of different COH protocols on pregnancy outcomes in adenomyosis patients. STUDY DESIGN: A real-world retrospective cohort study analyzed 1486 IVF-ET cycles in adenomyosis patients who received COH regimens between 2018 and 2021. Pregnancy outcomes were compared among patients under different COH protocols. RESULTS: = 0.995), with significantly less gonadotropin used in the antagonist protocol. CONCLUSIONS: In adenomyosis patients, the long/ultra-long provided better fresh-cycle outcomes. While the antagonist protocol had lower overall pregnancy rates, it preserved cumulative pregnancy rates in young patients with normal ovarian reserves and reduced gonadotropin exposure.
Wang et al. (2026) studied this question.