Embryo Cryopreservation involves the freezing of embryos created by IVF or ICSI. Your physician may recommend freezing embryos for several reasons:
- Planned during IVF in order to perform pre-implantation genetic testing (PGT)
- To save embryos for a future pregnancy
- During IVF you have too large of a response (ovarian hyperstimulation). Your physician may recommend freezing all embryos and performing a frozen embryo transfer in the future at a safer time
- You may freeze embryos prior to cancer or other medical therapy
- As a plan to delay building your family until the future while protecting yourself against changes in fertility
Embryos may remain frozen for many years. Although not every frozen embryo will thaw properly at a later time, successful thaw rates are extremely high (>98%). It is important that you discuss with your physician how those embryos will be used in the future and how long you anticipate keeping them frozen.