Non-inferiority of progestin-primed ovarian stimulation versus GnRH antagonist protocol: A propensity score-weighted analysis.

Purpose: To evaluate the effectiveness of the progestin-primed ovarian stimulation (PPOS) protocol versus the gonadotropin-releasing hormone antagonist (GnRH-ant) protocol in ovarian stimulation.

Methods: In this retrospective cohort study, we included 804 patients who were treated between January 1, 2022, and July 1, 2023. Outcomes of ovarian stimulation were compared between the PPOS (n = 206) and GnRH-ant (n = 598).