PLOD1 and polycystic ovary syndrome: Table 3 shows the analysis of bivariate associations between prolactin and hormonal and metabolic variables in patients with PCOS, which displayed a negative association between prolactin levels and age, WC, HC, Waist-hip ratio, basal serum LH, LH/FSH, E2, FINS, HOMA-IR, HOMA-β, TG, and ALT (P < 0.05 or P < 0.001).