Embryos not used in the current cycle could be cryopreserved. Cryopreservation is typically accomplished with vitrification, a swift freezing course of action. Vitrification is believed to forestall cryoinjury by reducing the event of intracellular crystals.[35] All embryos can be frozen in people in danger for ovarian hyperstimulation syndrome (reviewed even https://www.ivf.com.mx/