INS and polycystic ovary syndrome: Previous studies have shown lower plasma omentin-1 levels in women with PCOS than in controls(13,39,40) with negative correlations between omentin-1 and BMI, insulin, and androgen levels.(13,39,41) In our study, omentin-1 was lower in the overall PCOS group and in the SO PCOS group compared to controls (p<0.05), consistent with these findings.