CryopreservationCryoprotective AgentsPropylene GlycolSemen PreservationVitrificationFreezingFertility PreservationEthylene GlycolDimethyl SulfoxideTissue PreservationSperm MotilitySpermatozoaFertilization in VitroEmbryo TransferSperm BanksReproductive Techniques, AssistedOocytesOrgan PreservationOvaryTissue Banks