VDR and polycystic ovary syndrome: Lots of studies have showed that VD/VDR plays a crucial role in the physiological and pathological processes of cancer [8, 16, 18–21], DN [3, 22, 23], autoimmune diseases, inflammation, infection, cardiovascular disease [1, 24], hereditary 1,25-dihydroxyvitamin D-resistant rickets (HVDRR) [2], etc. O. Teriolo et al. have reported the role of VD/VDR in gynecological diseases, such as breast cancer, ovarian cancer, polycystic ovary syndrome, and endometriosis.