Antral follicle counting in predicting the retrieved oocyte number after ovarian hyperstimulation

Purpose: To evaluate the antral follicle (AF) counting in predicting the ou tcome after controlled ovarian hyperstimulation (COH) and IVF-ET: Methods: Infertile women who accepted the COH and IVF-ET were included pros pectively Day-3 AF number was determined by transvaginal sonography. They w ere divided into three groups: Group 1: less than or equal to3 AF; Group 2: 4-10 AF; Group 3: greater than or equal to 11 AF. Retrieval oocyte number, embryo number, pregnancy rate (PR), and implantation rate (IR) of the thre e groups were compared. Results: A total of 372 cycles were included. Patients in Groups 1, 2, and 3 were statistically different in age (35.3 vs. 31.9 vs. 28.5), Day-3 FSH ( 14.3 vs. 5.9 vs. 4.1), cancellation (34.4% vs. 2.7% vs. 0.9%), gonadotropin dosage, retrieval oocyte number (2.9 vs. 8.2 vs. 14.5), embryo number (2.2 vs 6.5 vs. 11.7), PR (11.1% vs. 34.6% vs 35.0%, and IR (3.0% vs. 8.2% vs. 8.9%). Conclusions: Patients with less than or equal to3 AF have a significantly h igher cancellation rate, fewer retrieved oocyte number, and lower PR. Combi nation of AF counting and basal FSH level increased the sensitivity in pred icting the ovarian reserve. Retrieved oocyte number could be predicted by t he formula: oocyte = 0.802 x AF + 2.01.