Embryo, MammalianEmbryo ImplantationBlastocystBlastomeresEmbryo ResearchEmbryonic DevelopmentEmbryo, NonmammalianClone CellsFertilization in VitroChick EmbryoEmbryonic and Fetal DevelopmentPersonhoodBeginning of Human LifePregnancyEmbryo DispositionCryopreservationEmbryo Culture TechniquesEmbryo TransferPregnancy RateGene Expression Regulation, DevelopmentalZygotePreimplantation DiagnosisLifeMolecular Sequence DataCulture TechniquesValue of LifeMosaicismAnatomy, ArtisticTheologyEctogenesisMorulaBase SequenceEmbryologyIncubatorsSperm Injections, IntracytoplasmicCloning, OrganismSingle Embryo TransferOocytesFetal ResearchPrenatal InjuriesAmino Acid SequenceResearch Embryo CreationEthylene GlycolCloning, MolecularEmbryo LossMoralsGestational AgeFetal ViabilityReproductive TechniquesCryoprotective AgentsVitrificationHuman CharacteristicsRNA, MessengerAneuploidyTime FactorsTrophoblastsCell LineCleavage Stage, OvumIn Situ HybridizationGamete Intrafallopian TransferPregnancy OutcomeYolk SacMesodermCulture MediaMorphogenesisFetusDNA, ComplementaryGerm LayersFertilizationZona PellucidaCatholicismThiepinsNontherapeutic Human ExperimentationDNATotipotent Stem CellsCell DifferentiationChromosome AberrationsEmbryonic Stem CellsMutationEastern OrthodoxyZebrafishEndometriumPropylene GlycolPhenotypeReproductive Techniques, AssistedIn Situ Hybridization, FluorescenceBones of Upper ExtremityImmunohistochemistryNotochordHomeodomain ProteinsTranscription FactorsGene ExpressionCell NucleusGastrulaPolymerase Chain ReactionBody PatterningFallopian TubesPhilosophy, MedicalCells, CulturedCell Lineage