Embryo Cryopreservation and Storage
Embryo freezing and storing is an important part of the IVF process. Patients who have additional good quality embryos can freeze them for future use. Frozen embryos can be stored at our center for up to 5 years and beyond either to be used if not pregnant in the next cycle or if the woman gets pregnant in the fresh cycle to be used for the next child. These frozen embryos provide a second or even third opportunity for pregnancy without undergoing another ovarian stimulation and retrieval.
The technique for freezing embryos is called vitrification. In this ultra-rapid freezing method, embryos are placed into special solutions and then placed immediately into liquid nitrogen. Embryos are stored as for slow cooling. Although it is a very safe and effective method, not all embryos survive the freezing/thawing procedure this is very rare the case. Embryos can be stored indefinitely without a compromise in their quality.
Embryos can be transferred to patients whose cycle has been synchronized with that of the stage of the frozen embryo. Alternatively, embryos can be transferred during a “natural” cycle.