CXCR2 and polycystic ovary syndrome: The results showed that in the dominant model, the CXCR2 (CA+AA) vs. CC genotype was associated with increased susceptibility to PCOS, with an OD 2.25 (95% CI = 1.131–3.872), RR = 1.49 (1.141 to 1.957), p < 0.032.