IL18 and polycystic ovary syndrome: The mean level of IL-18 in obese PCOS women was 247.5 pg/mL (S.D. = 63.6), in the lean PCOS women the mean level was 172.5 pg/mL (S.D. = 64.0) and in control group the mean level was 122.5 pg/mL (S.D. = 40.2).