Infertile women with PCOS seemed to have a higher rate of live birth after undergoing IVF with frozen embryos compared with fresh embryos. Not only was the frequency of live birth after the first transfer higher. But frozen embryo transfer was associated with a significantly lower frequency of pregnancy loss and ovarian hyper stimulation syndrome. A potentially life-threatening medical condition affecting women taking fertility medication. Patients with PCOS are at high risk of ovarian hyper stimulation syndrome following IVF due. Primarily, to their typically vigorous response to gonadotropin induced ovarian stimulation. When embryos are frozen and the transfer is delayed until a subsequent cycle. The ovaries have a chance to recover. In addition, as no gonadotropin stimulation is required for frozen embryo transfers. Embryos are transferred into a more physiologic uterine environment. There is essentially no risk of OHSS, and higher pregnancy rates result as well.