Embryos not Employed in The existing cycle can be cryopreserved. Cryopreservation is often reached with vitrification, a quick freezing process. Vitrification is thought to avoid cryoinjury by lowering the development of intracellular crystals.[35] All embryos will also be frozen in clients at risk for ovarian hyperstimulation syndrome (discussed more in https://www.ivf.com.mx/