Cloning, OrganismNuclear Transfer TechniquesEmbryo, MammalianEmbryo ImplantationBlastocystBlastomeresEmbryo ResearchEmbryonic DevelopmentClone CellsEmbryo, NonmammalianFertilization in VitroChick EmbryoEmbryonic and Fetal DevelopmentPersonhoodBeginning of Human LifePregnancyCloning, MolecularEmbryo DispositionCryopreservationMolecular Sequence DataEmbryo Culture TechniquesEmbryo TransferBase SequenceAmino Acid SequenceGene Expression Regulation, DevelopmentalPregnancy RateZygoteLifePreimplantation DiagnosisCulture TechniquesValue of LifeMosaicismAnatomy, ArtisticTheologyEctogenesisMorulaEmbryologyIncubatorsSperm Injections, IntracytoplasmicOocytesSingle Embryo TransferFetal ResearchPrenatal InjuriesResearch Embryo CreationRNA, MessengerDNA, ComplementaryEthylene GlycolEmbryo LossFetal ViabilityMoralsGestational AgeCell LineVitrificationReproductive TechniquesCryoprotective AgentsHuman CharacteristicsAneuploidyDNAIn Situ HybridizationTrophoblastsCleavage Stage, OvumSequence Homology, Amino AcidGamete Intrafallopian TransferCulture MediaPregnancy OutcomeYolk SacMesodermMorphogenesisFetusGerm LayersFertilizationTime FactorsMutationNucleic Acid HybridizationZona PellucidaCatholicismThiepinsTotipotent Stem CellsGene ExpressionNontherapeutic Human ExperimentationChromosome AberrationsCell DifferentiationEmbryonic Stem CellsPolymerase Chain ReactionEastern OrthodoxyTranscription, GeneticZebrafishPropylene GlycolEndometriumIn Situ Hybridization, FluorescenceSequence Analysis, DNAPhenotypeReproductive Techniques, AssistedTranscription FactorsBones of Upper ExtremityNotochordCell NucleusSequence Homology, Nucleic AcidPlasmidsHomeodomain Proteins