Embryos not used in The present cycle can be cryopreserved. Cryopreservation is often realized with vitrification, a swift freezing system. Vitrification is believed to prevent cryoinjury by decreasing the development of intracellular crystals.[35] All embryos can also be frozen in clients in danger for ovarian hyperstimulation syndrome (reviewed further more https://www.ivf.com.mx/