Embryo Freezing

Embryo freezing (cryopreservation) allows further attempts at pregnancy after an IVF treatment. The couple may have had a successful IVF pregnancy and wish another child some years later, or frozen embryos may be used a few months after an unsuccessful IVF treatment. Embryos are stored in liquid nitrogen at minus 198 degrees Celsius, and in Nigeria can be kept in storage for up to ten years. Not all embryos are suitable for freezing: poorer quality embryos will not survive the process and it may be better to repeat another ‘fresh’ IVF cycle.