GNRH1 and endometrial polyp: During COS monitoring, 28 patients were excluded from the study based on the following criteria: abnormalities identified during TVUS monitoring, such as hydrosalpinx and endometrial polyps (n = 9); cycle cancellation due to poor response to COS (n = 2); cycle cancellation for personal reasons (n = 4); ovulatory signs on TVUS or P4 ≥ 1.5 ng/mL on the triggering day (n = 5); and triggering performed with an a-GnRH (n = 8).