Embryos not used in the current cycle may be cryopreserved. Cryopreservation is usually obtained with vitrification, a rapid freezing method. Vitrification is assumed to forestall cryoinjury by reducing the event of intracellular crystals.[35] All embryos can even be frozen in patients in danger for ovarian hyperstimulation syndrome (discussed further more https://bookmarkize.com/story18523895/in-vitro-fertilization-for-dummies