Embryo, MammalianStem CellsBlastocystEmbryo ImplantationEmbryo 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, DevelopmentalInduced Pluripotent Stem CellsZygotePregnancy RateCulture TechniquesPreimplantation DiagnosisLifeHematopoietic Stem Cell TransplantationValue of LifeCloning, OrganismCell LineageStem Cell NicheMorulaMosaicismNeural Stem CellsAnatomy, ArtisticTheologyEctogenesisEmbryologyIncubatorsSperm Injections, IntracytoplasmicTotipotent Stem CellsMultipotent Stem CellsMolecular Sequence DataOocytesResearch Embryo CreationSingle Embryo TransferFetal ResearchGerm LayersMesenchymal Stem Cell TransplantationPrenatal InjuriesBase SequenceCells, CulturedMesenchymal Stromal CellsOctamer Transcription Factor-3Ethylene GlycolEmbryo LossCell LineStem Cell FactorGestational AgeTime FactorsMoralsTrophoblastsCell Culture TechniquesFetal ViabilityMesodermCryoprotective AgentsCulture MediaReproductive TechniquesVitrificationAneuploidyHuman CharacteristicsCloning, MolecularHomeodomain ProteinsFetusYolk SacRNA, MessengerCleavage Stage, OvumIn Situ HybridizationAmino Acid SequenceImmunohistochemistryGamete Intrafallopian TransferTranscription FactorsMorphogenesisPregnancy OutcomeStem Cell ResearchPhenotypeCoculture TechniquesCatholicismFertilizationSignal TransductionModels, BiologicalZona PellucidaThiepinsPlant StemsNontherapeutic Human Experimentation