Embryos not used in The existing cycle may be cryopreserved. Cryopreservation is usually reached with vitrification, a speedy freezing approach. Vitrification is believed to forestall cryoinjury by reducing the development of intracellular crystals.[35] All embryos can also be frozen in clients at risk for ovarian hyperstimulation syndrome (discussed more in https://www.ivf.com.mx/