Embryo, MammalianEmbryo ImplantationBlastocystBlastomeresEmbryo ResearchEmbryonic DevelopmentClone CellsEmbryo, NonmammalianFertilization in VitroChick EmbryoEmbryonic and Fetal DevelopmentPersonhoodBeginning of Human LifePregnancyCloning, MolecularMolecular Sequence DataEmbryo DispositionCryopreservationBase SequenceEmbryo Culture TechniquesEmbryo TransferAmino Acid SequenceGene Expression Regulation, DevelopmentalCloning, OrganismPregnancy RateZygoteLifePreimplantation DiagnosisCulture TechniquesValue of LifeMosaicismAnatomy, ArtisticTheologyEctogenesisMorulaEmbryologyIncubatorsOocytesSperm Injections, IntracytoplasmicSingle Embryo TransferFetal ResearchRNA, MessengerPrenatal InjuriesResearch Embryo CreationDNA, ComplementaryEthylene GlycolEmbryo LossCell LineFetal ViabilityGestational AgeMoralsVitrificationReproductive TechniquesCryoprotective AgentsHuman CharacteristicsAneuploidyDNASequence Homology, Amino AcidIn Situ HybridizationTrophoblastsCleavage Stage, OvumTime FactorsCulture MediaGamete Intrafallopian TransferMutationPregnancy OutcomeYolk SacMesodermFetusMorphogenesisGene ExpressionFertilizationGerm LayersNucleic Acid HybridizationPolymerase Chain ReactionZona PellucidaCatholicismThiepinsCell DifferentiationTotipotent Stem CellsNontherapeutic Human ExperimentationSequence Analysis, DNAPhenotypeChromosome AberrationsTranscription, GeneticEmbryonic Stem CellsZebrafishEastern OrthodoxyTranscription FactorsEndometriumPropylene GlycolIn Situ Hybridization, FluorescenceSequence Homology, Nucleic AcidPlasmidsReproductive Techniques, AssistedCell NucleusHomeodomain ProteinsNuclear Transfer TechniquesImmunohistochemistrySequence Alignment