Embryo, MammalianEmbryo ImplantationBlastocystBlastomeresEmbryo ResearchEmbryonic DevelopmentEmbryo, NonmammalianFertilization in VitroChick EmbryoEmbryonic and Fetal DevelopmentPersonhoodBeginning of Human LifePregnancyEmbryo DispositionCryopreservationEmbryo Culture TechniquesEmbryo TransferPregnancy RateZygoteGene Expression Regulation, DevelopmentalCloning, MolecularLifePreimplantation DiagnosisCloning, OrganismCulture TechniquesValue of LifeMolecular Sequence DataMosaicismAnatomy, ArtisticTheologyEctogenesisMorulaEmbryologyIncubatorsBase SequenceSperm Injections, IntracytoplasmicOocytesSingle Embryo TransferFetal ResearchAmino Acid SequencePrenatal InjuriesResearch Embryo CreationEthylene GlycolEmbryo LossFetal ViabilityMoralsGestational AgeVitrificationReproductive TechniquesCryoprotective AgentsHuman CharacteristicsAneuploidyCleavage Stage, OvumTrophoblastsGamete Intrafallopian TransferPregnancy OutcomeIn Situ HybridizationYolk SacRNA, MessengerMesodermCulture MediaMorphogenesisGerm LayersFertilizationFetusZona PellucidaCatholicismThiepinsTotipotent Stem CellsNontherapeutic Human ExperimentationCell LineTime FactorsEmbryonic Stem CellsEastern OrthodoxyDNA, ComplementaryPropylene GlycolChromosome AberrationsZebrafishEndometriumReproductive Techniques, AssistedSequence Homology, Amino AcidBones of Upper ExtremityNotochordCell DifferentiationNuclear Transfer TechniquesGastrulaMutationHomeodomain ProteinsFallopian TubesCell NucleusTranscription FactorsPhilosophy, MedicalGene ExpressionBody PatterningIn Situ Hybridization, FluorescenceImmunohistochemistryDNATranscription, GeneticTissue SurvivalInfertility, Female