Insulin, HOMA-IR, LH, E2, prolactin, DHEAS and TT levels were significantly higher in PCOS group (p < 0.001, p < 0.001, p < 0.001, p = 0.038, p = 0.012, p = 0.001 and p < 0.001, respectively). Here, PLOD1 is linked to polycystic ovary syndrome.