Based on responses observed in normal women, the PCOS women were divided into two groups. Those with 17P responses that did not exceed the normal mean plus 2 standard deviations (normal responder PCOS; NR-PCOS) and those that did exceed the normal response (high responder PCOS; HR-PCOS). This separation occurred at a rate of 50%. Notably, serum AMH levels were 2-fold higher in NR-PCOS compared to HR-PCOS. This finding was puzzling as serum AMH levels have been shown to correlate to the number of small follicles present in ovaries suggesting that AMH may be a surrogate for small follicle number. However, both PCOS subgroups had equivalent follicle numbers. The investigators hypothesize that the NR-PCOS have greater number of small follicles compared to HR-PCOS. To address this issue the investigators propose to assess the number of small follicles in NR- and HR-PCOS women and normal controls.