Embryos not Employed in The existing cycle is usually cryopreserved. Cryopreservation is typically reached with vitrification, a swift freezing process. Vitrification is assumed to avoid cryoinjury by reducing the development of intracellular crystals.[35] All embryos can even be frozen in clients at risk for ovarian hyperstimulation syndrome (discussed further in https://www.ivf.com.mx/