The serum miR-23a level was also negative correlated with GLU (Fig. 1f, P = 0.0215, r = 0.3245), INS (Fig. 1h, P = 0.0013, r = 0.4414) and T (Fig. 1j, P = 0.0110, r = 0.3569) concentration in PCOS patients, but not in healthy control group (GLU: Fig. 1g, P = 0.9361, r = 0.0116; INS: Fig. 1i, P = 0.0678, r = 0.2604; and T, Fig. 1k, P = 0.7091, r = 0.0541). The gene discussed is INS; the disease is polycystic ovary syndrome.