A further RCT [39] in a selected high-risk population of 80 PCOS patients who received r-FSH for ovarian stimulation in GnRH-ant IVF cycles compared the administration of different hCG doses for triggering, i.e., 10,000 IU vs. 5000 IU vs. 2500 IU. Here, GNRH1 is linked to polycystic ovary syndrome.