Current evidence and the physiological role of vitamin D in reproductive activity might support the significance of vitamin D supplementation while doing IVF in infertile women with PCOS F. So, this study was aimed to determine the effects of vitamin D supplementation on glycemic control, markers of cardiometabolic abnormalities and gene expression of insulin and lipid metabolism in infertile women diagnosed with PCOS and candidate for IVF. Here, INS is linked to polycystic ovary syndrome.