PLOD1 and polycystic ovary syndrome: In addition to comparing DNA methylation between PCOS patients and controls, we also conducted EWAS on the 30 PCOS patients for their clinical features including BMI, MC, reproductive hormones (E2, LH, FSH, P, TSH, PRL, TST), and metabolic variables (IRI, IRI2, GLU, GLU2, HOMA-IR).