Embryos not used in The present cycle is usually cryopreserved. Cryopreservation is often attained with vitrification, a rapid freezing approach. Vitrification is thought to prevent cryoinjury by reducing the event of intracellular crystals.[35] All embryos will also be frozen in people at risk for ovarian hyperstimulation syndrome (mentioned even further https://www.ivf.com.mx/