Embryonic Stem CellsEmbryo, MammalianStem CellsEmbryo ResearchBlastocystEmbryo ImplantationBlastomeresEmbryonic DevelopmentCell DifferentiationPluripotent Stem CellsEmbryo, NonmammalianFertilization in VitroEmbryonic and Fetal DevelopmentChick EmbryoGene Expression Regulation, DevelopmentalPersonhoodOctamer Transcription Factor-3Beginning of Human LifeStem Cell TransplantationPregnancyEmbryo Culture TechniquesEmbryo DispositionCryopreservationCell LineageEmbryo TransferCell LineTotipotent Stem CellsCell Culture TechniquesInduced Pluripotent Stem CellsCells, CulturedHematopoietic Stem CellsGerm LayersCloning, OrganismHomeodomain ProteinsZygoteValue of LifePreimplantation DiagnosisPregnancy RateCulture TechniquesEmbryoid BodiesMorulaLifeResearch Embryo CreationMosaicismPlant StemsSOXB1 Transcription FactorsEctogenesisAdult Stem CellsTeratomaAnatomy, ArtisticTheologyTranscription FactorsChimeraEndodermMesodermNeural Stem CellsEmbryologyNeoplastic Stem CellsIncubatorsSperm Injections, IntracytoplasmicEmbryo LossOocytesSingle Embryo TransferGene Expression ProfilingFetal ResearchFetal ViabilityTrophoblastsGene TargetingMoralsTime FactorsPrenatal InjuriesCoculture TechniquesYolk SacSignal TransductionRNA, MessengerLeukemia Inhibitory FactorEthylene GlycolMultipotent Stem CellsCryoprotective AgentsImmunohistochemistryGestational AgeCulture MediaAneuploidyBase SequenceVitrificationMolecular Sequence DataReverse Transcriptase Polymerase Chain ReactionCell ProliferationIn Situ HybridizationFetusReproductive TechniquesCleavage Stage, OvumGene ExpressionPhenotypeHuman CharacteristicsGene Expression RegulationBiological MarkersCatholicismStem Cell NicheMorphogenesis