Twinning, MonozygoticGenetic DeterminismCloning, OrganismEmbryo, MammalianStem CellsBlastocystEmbryo ImplantationCloning, MolecularEmbryo ResearchBlastomeresEmbryonic DevelopmentEmbryonic Stem CellsEmbryo, NonmammalianFertilization in VitroChick EmbryoEmbryonic and Fetal DevelopmentPersonhoodStem Cell TransplantationBeginning of Human LifePregnancyPluripotent Stem CellsCryopreservationEmbryo Culture TechniquesHematopoietic Stem CellsEmbryo DispositionAdult Stem CellsCell DifferentiationEmbryo TransferGene Expression Regulation, DevelopmentalMolecular Sequence DataBase SequenceInduced Pluripotent Stem CellsZygotePregnancy RateAmino Acid SequenceCulture TechniquesPreimplantation DiagnosisLifeHematopoietic Stem Cell TransplantationValue of LifeCell LineageStem Cell NicheMorulaMosaicismNeural Stem CellsAnatomy, ArtisticTheologyEctogenesisEmbryologyIncubatorsOocytesTotipotent Stem CellsSperm Injections, IntracytoplasmicMultipotent Stem CellsResearch Embryo CreationSingle Embryo TransferCell LineCells, CulturedFetal ResearchGerm LayersMesenchymal Stem Cell TransplantationPrenatal InjuriesOctamer Transcription Factor-3RNA, MessengerMesenchymal Stromal CellsEthylene GlycolEmbryo LossStem Cell FactorTime FactorsGestational AgeMoralsCell Culture TechniquesDNA, ComplementaryTrophoblastsMesodermFetal ViabilityCulture MediaCryoprotective AgentsReproductive TechniquesVitrificationIn Situ HybridizationAneuploidyFetusHuman CharacteristicsHomeodomain ProteinsYolk SacSequence Homology, Amino AcidCleavage Stage, OvumGene ExpressionTranscription FactorsImmunohistochemistryPhenotypeGamete Intrafallopian TransferMorphogenesisPregnancy OutcomeStem Cell ResearchCoculture TechniquesMutationFertilizationCatholicism