Consistent with previous studies, this study further determined that patients with PCOS had significantly higher TOS, OSI, and the ratio of apoB-PAF-AH to H-PAF-AH activities compared with the control women, suggesting that increased circulating absolute (TOS) and relative (OSI) oxidative stress levels and chronic inflammation existed in these patients. The gene discussed is APOB; the disease is polycystic ovary syndrome.