Embryo TransferSingle Embryo TransferFertilization in VitroEmbryo ImplantationEmbryo, MammalianPregnancy RatePregnancyEmbryo, NonmammalianCryopreservationChick EmbryoPregnancy, MultipleBlastocystSperm Injections, IntracytoplasmicPregnancy OutcomeCleavage Stage, OvumLive BirthEmbryonic DevelopmentInfertilityInfertility, FemaleEmbryonic and Fetal DevelopmentOvulation InductionBlastomeresZygote Intrafallopian TransferOocyte DonationTwinsReproductive TechniquesEmbryo LossOocytesReproductive Techniques, AssistedMorulaAbortion, SpontaneousChorionic GonadotropinPreimplantation DiagnosisGene Expression Regulation, DevelopmentalEmbryo Culture TechniquesCloning, OrganismBirth RateUterusVitrificationZygoteNuclear Transfer TechniquesGene Transfer TechniquesMenotropinsOvarian Hyperstimulation SyndromeEndometriumCulture TechniquesSuperovulationFertilizationTime FactorsFallopian Tube DiseasesZona PellucidaEmbryo DispositionPregnancy, EctopicOocyte RetrievalInsemination, ArtificialMaternal AgeZebrafishPregnancy Reduction, MultifetalFreezingBuserelinProgesteroneMicroinjectionsRetrospective StudiesPregnancy, TwinSpermatozoaFetal ViabilityFallopian TubesGastrulaMultiple Birth OffspringGene Transfer, HorizontalCatheterizationBody PatterningTwinning, MonozygoticUltrasonographyMolecular Sequence DataIn Situ HybridizationLuteal PhaseCattleIncubatorsFollicle Stimulating HormonePregnancy, TubalOvaryFertility Agents, FemaleSurrogate MothersPregnancy, AnimalEmbryo ResearchMorphogenesisFollicular FluidTripletsEstradiolLitter SizeMesodermGonadotropin-Releasing HormoneEctogenesisPregnancy MaintenanceMice, Inbred ICRChorionic Gonadotropin, beta Subunit, HumanEctodermMicromanipulationAbortion, Veterinary