- Participants initially recruited to the normal responders study who exhibit excessive ovarian response markers on triggering day: high amount of middle-large follicles (> 13 follicles ≥ 11mm on triggering day). All previous inclusion criteria are assessed before initiation of the IVF cycle and ovarian stimulation, and all of them represent pre-stimulation risk factors for high ovarian response. The patient's actual response will be assessed on triggering day (after completion of ovarian stimulation). Final assignment of responder category followed by randomization will only be performed on the day of triggering