In subgroup analyses by ethnicity, however, no significant association between the CYP17A1 rs743572 polymorphisms and the PCOS susceptibility was found in the Asian (p = 0.054, OR = 0.83, 95%CI 0.68–1.00), Caucasian (p = 0.252, OR = 0.87, 95%CI 0.72–1.09) and mixed (p = 0.148, OR = 0.80, 95%CI 0.60–1.08) population. This evidence concerns the gene CYP17A1 and polycystic ovary syndrome.