Inclusion Criteria:  Age - from 20 to 40; AMH - more than 2.5 ng/ml Number of antral follicles (AFC) - more than 15 (menstrual cycle days 1-5) Stimulation of ovarian function in the protocol with GnRH-ant in IVF/ICSI cycles, with the change of the ovulation trigger to GnRH-a Tubal, unspecified and anovulatory infertility Body mass index (BMI) from 18 to 29 (inclusive) 15 or more follicles per day of ovulation trigger injection  Exclusion Criteria:  Presence of external genital endometriosis Male factor of infertility Hydrosalpinx and/or tubo-ovarian formation (on one or both sides) according to hysterosalpingography and/or ultrasound investigation Malformations of internal genital organs, including conditions after surgical correction of malformations of internal genital organs Acquired deformities of the uterine cavity, in which embryo implantation or pregnancy is impossible Contraindications to the IVF/ICSI program; severe systemic diseases Cycles with GnRH antagonists