Power Analysis Results of the investigators' pilot study have shown that approximately 50% of PCOS women will exhibit 17OHP responses to hCG stimulation similar to those of normal women. Consequently, a sample size of 20 subjects in each group has an 80% power to detect a difference in the means of 0.820 ng/ml (the difference between the average 17OHP expression level in high responder PCOS women (HR-PCOS), 2.840 ng/ml, and that of normal responder PCOS (NR-PCOS) women, 2.02 ng/ml), which is a 33% increase. In the proposed study, the investigators believe that HR-PCOS (n=20) will show significantly greater (33% more) 17OHP production in response to hCG stimulation than NR-PCOS (n=20) at a power of 0.8 and a type I error rate of 0.05. The investigators will recruit 25 subjects in each group to allow for subject drop out. A secondary analysis will be performed between women with PCOS and normal controls (n=20).