Single Embryo TransferPregnancy, MultipleEmbryo TransferFertilization in VitroPregnancy RateTwinsSperm Injections, IntracytoplasmicEmbryo, MammalianEmbryo ImplantationPregnancyReproductive Techniques, AssistedBlastocystCryopreservationPregnancy OutcomeCleavage Stage, OvumEmbryo Culture TechniquesLive BirthEmbryonic DevelopmentInfertilityMultiple Birth OffspringEmbryo, NonmammalianPreimplantation DiagnosisChick EmbryoBlastomeresBirth RateOvulation InductionMaternal AgeOocytesEmbryo LossEmbryonic and Fetal DevelopmentGene Expression Regulation, DevelopmentalCost-Benefit AnalysisRetrospective StudiesInfant, NewbornEmbryo DispositionMorulaZygoteZebrafishGastrulaBody PatterningTreatment OutcomeIn Situ HybridizationEmbryo ResearchMorphogenesisCloning, OrganismCulture Techniques