Embryo freezing or embryo cryopreservation is similar to the process of egg freezing. The difference is that instead of unfertilized eggs, it helps in preserving a fertilized embryo. The procedure involves boosting egg and sperm cells and transforming them into embryos which are then frozen. The embryo can be thawed and used later. Embryo freezing is a crucial element of IVF programs. Embryo freezing is a feasible option for couples to try again if their first attempt to have a baby through IVF fails. Couples conceiving their first child through IVF can have more by freezing embryos.