Embryo ResearchCloning, OrganismEmbryo, MammalianEmbryo ImplantationBlastocystBlastomeresEmbryonic DevelopmentEmbryo, NonmammalianFertilization in VitroChick EmbryoEmbryonic and Fetal DevelopmentPersonhoodBeginning of Human LifePregnancyEmbryo DispositionCryopreservationEmbryo Culture TechniquesEmbryo TransferPregnancy RateZygoteLifePreimplantation DiagnosisGene Expression Regulation, DevelopmentalValue of LifeCulture TechniquesAnatomy, ArtisticMosaicismTheologyEctogenesisMorulaEmbryologyIncubatorsSperm Injections, IntracytoplasmicSingle Embryo TransferFetal ResearchPrenatal InjuriesOocytesResearch Embryo CreationEthylene GlycolEmbryo LossMoralsFetal ViabilityGestational AgeReproductive TechniquesCryoprotective AgentsVitrificationHuman CharacteristicsAneuploidyCleavage Stage, OvumTrophoblastsGamete Intrafallopian TransferPregnancy OutcomeYolk SacMesodermGerm LayersMorphogenesisCatholicismZona PellucidaFertilizationIn Situ HybridizationThiepinsCulture MediaTotipotent Stem CellsFetusNontherapeutic Human ExperimentationEastern OrthodoxyEmbryonic Stem CellsPropylene GlycolChromosome AberrationsTime FactorsEndometriumReproductive Techniques, AssistedBones of Upper ExtremityZebrafishNotochordGastrulaFallopian TubesCell DifferentiationPhilosophy, MedicalBody PatterningHomeodomain ProteinsRNA, MessengerMolecular Sequence DataCell NucleusTissue SurvivalIn Situ Hybridization, FluorescenceInfertility, FemaleCell LineImmunohistochemistryPregnancy Trimester, FirstUrogenital SystemTranscription FactorsConjunctivitisAtlases as TopicOrganogenesisNeural Tube DefectsCell LineageBase SequenceChromosome DisordersNuclear Transfer Techniques