Embryos not used in the current cycle is often cryopreserved. Cryopreservation is often reached with vitrification, a immediate freezing procedure. Vitrification is believed to forestall cryoinjury by reducing the event of intracellular crystals.[35] All embryos can also be frozen in people in danger for ovarian hyperstimulation syndrome (talked about further https://www.ivf.com.mx/