Embryos not Utilized in The present cycle is usually cryopreserved. Cryopreservation is usually reached with vitrification, a swift freezing method. Vitrification is assumed to circumvent cryoinjury by decreasing the development of intracellular crystals.[35] All embryos can be frozen in people at risk for ovarian hyperstimulation syndrome (talked over further in https://www.ivf.com.mx/