Embryo TransferSingle Embryo TransferFertilization in VitroPregnancy RateEmbryo ImplantationPregnancyEmbryo, MammalianCryopreservationPregnancy, MultipleHorse DiseasesSperm Injections, IntracytoplasmicPregnancy OutcomeHorsesBlastocystLive BirthInfertilityInfertility, FemaleEmbryo, NonmammalianOvulation InductionChick EmbryoCleavage Stage, OvumZygote Intrafallopian TransferTwinsOocyte DonationReproductive Techniques, AssistedReproductive TechniquesEmbryonic DevelopmentEmbryonic and Fetal DevelopmentBlastomeresAbortion, SpontaneousActinomycetales InfectionsOocytesChorionic GonadotropinEmbryo Culture TechniquesBirth RatePreimplantation DiagnosisMorulaGene Transfer TechniquesOvarian Hyperstimulation SyndromeUterusMenotropinsVitrificationEmbryo LossEndometriumCloning, OrganismFallopian Tube DiseasesOocyte RetrievalPregnancy, EctopicSuperovulationNuclear Transfer TechniquesInsemination, ArtificialTime FactorsMaternal AgePregnancy Reduction, MultifetalBuserelinFertilizationZona PellucidaGene Transfer, HorizontalPregnancy, TwinRetrospective StudiesCatheterizationAbortion, VeterinaryProgesteroneCulture TechniquesZygoteUltrasonographyMultiple Birth OffspringFreezingTwinning, MonozygoticLuteal PhaseGene Expression Regulation, DevelopmentalPregnancy, TubalPregnancy, AnimalSpermatozoaFollicle Stimulating HormoneSurrogate MothersIncubatorsFertility Agents, FemaleFallopian TubesTripletsAnimals, NewbornFollicular FluidOvaryMicroinjectionsGonadotropin-Releasing HormoneMicromanipulationEstradiolLabor Stage, FirstNafarelinChorionic Gonadotropin, beta Subunit, HumanLitter SizeCattlePregnancy MaintenanceGamete Intrafallopian TransferFetal ViabilityProspective StudiesUterine ContractionTreatment OutcomeTransfer (Psychology)Fetal Death