Embryo TransferSperm Injections, IntracytoplasmicSingle Embryo TransferFertilization in VitroPregnancy RateEmbryo ImplantationPregnancyEmbryo, MammalianCryopreservationPregnancy, MultiplePregnancy OutcomeBlastocystLive BirthInfertilityInfertility, FemaleEmbryo, NonmammalianOvulation InductionChick EmbryoCleavage Stage, OvumZygote Intrafallopian TransferTwinsOocyte DonationReproductive Techniques, AssistedReproductive TechniquesEmbryonic DevelopmentEmbryonic and Fetal DevelopmentBlastomeresAbortion, SpontaneousOocytesChorionic GonadotropinEmbryo Culture TechniquesBirth RatePreimplantation DiagnosisMorulaGene Transfer TechniquesOvarian Hyperstimulation SyndromeUterusMenotropinsVitrificationEmbryo LossEndometriumCloning, OrganismFallopian Tube DiseasesOocyte RetrievalPregnancy, EctopicSuperovulationNuclear Transfer TechniquesTime FactorsMaternal AgeRetrospective StudiesInsemination, ArtificialPregnancy Reduction, MultifetalFertilizationBuserelinGene Transfer, HorizontalZona PellucidaCatheterizationPregnancy, TwinProgesteroneCulture TechniquesUltrasonographyZygoteFreezingMultiple Birth OffspringTwinning, MonozygoticLuteal PhaseGene Expression Regulation, DevelopmentalPregnancy, TubalSpermatozoaFollicle Stimulating HormoneSurrogate MothersIncubatorsFertility Agents, FemaleFallopian TubesTripletsFollicular FluidOvaryMicroinjectionsGonadotropin-Releasing HormoneMicromanipulationEstradiolPregnancy, AnimalLabor Stage, FirstChorionic Gonadotropin, beta Subunit, HumanNafarelinProspective StudiesTreatment OutcomeCattleLitter SizeAbortion, VeterinaryPregnancy MaintenanceGamete Intrafallopian TransferFetal ViabilityUterine ContractionTransfer (Psychology)Pregnancy TestsMolecular Sequence DataTwins, MonozygoticInfertility, MaleTriptorelin Pamoate