Between group comparison of rFSH-induced peak estradiol (E2) production per follicle in Ovulatory Control (OC, n=22) and Polycystic Ovary Syndrome (PCOS, n=8) participants after low dose (0.53 IU/kg/d), medium dose (1.1 IU/kg/d), and high dose (2.2 IU/kg/d) stimulation. Significant differences between groups are denoted by asterisks. *, P<0.05; **, P<0.01; ***, P<0.001.