Embryo TransferSingle Embryo TransferFertilization in VitroPregnancy RateEmbryo ImplantationPregnancyEmbryo, MammalianCryopreservationPregnancy, MultipleSperm Injections, IntracytoplasmicPregnancy OutcomeBlastocystCell CycleLive BirthInfertilityInfertility, FemaleEmbryo, NonmammalianOvulation InductionCleavage Stage, OvumChick EmbryoZygote Intrafallopian TransferTwinsOocyte DonationReproductive Techniques, AssistedReproductive TechniquesEmbryonic DevelopmentEmbryonic and Fetal DevelopmentBlastomeresOocytesAbortion, SpontaneousChorionic GonadotropinEmbryo Culture TechniquesBirth RateMenstrual CyclePreimplantation DiagnosisUterusMorulaGene Transfer TechniquesMenotropinsOvarian Hyperstimulation SyndromeEndometriumVitrificationEmbryo LossTime FactorsCloning, OrganismFallopian Tube DiseasesOocyte RetrievalPregnancy, EctopicSuperovulationProgesteroneNuclear Transfer TechniquesMaternal AgeLuteal PhaseFertilizationBuserelinPregnancy Reduction, MultifetalInsemination, ArtificialRetrospective StudiesZona PellucidaGene Transfer, HorizontalPregnancy, TwinZygoteCatheterizationCulture TechniquesFreezingUltrasonographyFollicle Stimulating HormoneGene Expression Regulation, DevelopmentalMultiple Birth OffspringTwinning, MonozygoticFertility Agents, FemaleOvarySpermatozoaPregnancy, TubalFallopian TubesGonadotropin-Releasing HormoneSurrogate MothersIncubatorsFollicular FluidMicroinjectionsTripletsMolecular Sequence DataCattleCell Cycle ProteinsMicromanipulationNafarelinEstradiolPregnancy, AnimalChorionic Gonadotropin, beta Subunit, HumanLabor Stage, FirstLitter SizeProspective StudiesTreatment OutcomeAbortion, VeterinaryOvulationGamete Intrafallopian TransferFetal ViabilityPregnancy MaintenanceUterine ContractionOvarian Follicle