Therefore, due to the effect of serum levels of PTH and phosphorus on PCOS, as well as the role of calcium in oocyte maturation and early embryonic development, the present study was designed to investigate the possible associations among the BsmI variant of VDR gene and PTH, phosphorus, and calcium of obese women with PCOS in a sample of Iranian population. The gene discussed is VDR; the disease is polycystic ovary syndrome.