We first evaluated the expression and DNA methylation levels of HOXA10, PAX6, ESR1, ESR2, IGFBP1, GAB1, SLC2A4, and IRS1 genes, as well as global DNA methylation levels in the endometrium of PCOS patients and women without the disease (control group). The gene discussed is HOXA10; the disease is polycystic ovary syndrome.