Single Embryo TransferBlastocystEmbryo TransferLive BirthPregnancy RateCryopreservationTwinning, MonozygoticFertilization in VitroEmbryo ImplantationPregnancyVitrificationEmbryo Culture TechniquesCleavage Stage, OvumPregnancy OutcomeSperm Injections, IntracytoplasmicPregnancy, MultipleEmbryonic DevelopmentZona PellucidaInfertilityEmbryo, MammalianMorulaInfertility, FemaleBlastocyst Inner Cell MassEmbryonic and Fetal DevelopmentRetrospective StudiesTime FactorsNuclear Transfer TechniquesGene Transfer TechniquesCloning, OrganismZygoteCulture TechniquesOocytesEmbryo Implantation, DelayedBlastomeresTrophoblastsGene Transfer, HorizontalParthenogenesisProspective StudiesEctogenesisFetal ViabilityCattleUterusCulture MediaSuperovulation