A: Embryo vitrification can be used to freeze (cryopreserve) embryos for use at a later stage. The procedure is very successful for small embryos. Once the embryos have been placed into liquid nitrogen then can be stored indefinitely. Vitrified embryos are then warmed at a later date selected by the embryo owner, and at this stage can be transferred to an appropriate recipient mare, who can be synchronised so she is ready to receive an embryo.
