Normally couples obtain more embryos that the necessary for a single embryo transfer. If the quality of these embryos is adequate, and the patient so desires it, they can be cryopreserved to be used in future treatments.
Vitrification is the cryopreservation technique used at IMER. It is a cutting edge ultrafast freezing technique that obtains a survival rate of over 90% after unfreezing.
More than 60% of couples obtain embryos that are adequate for cryopreservation.