Embryo, MammalianEmbryo ImplantationBlastocystEmbryo ResearchBlastomeresEmbryonic DevelopmentEmbryo, NonmammalianFertilization in VitroChick EmbryoEmbryonic and Fetal DevelopmentPersonhoodBeginning of Human LifePregnancyEmbryo DispositionCryopreservationEmbryo Culture TechniquesEmbryo TransferPregnancy RateZygoteLifePreimplantation DiagnosisGene Expression Regulation, DevelopmentalValue of LifeCulture TechniquesDecision MakingAnatomy, ArtisticMosaicismTheologyEctogenesisMorulaEmbryologyIncubatorsSperm Injections, IntracytoplasmicSingle Embryo TransferFetal ResearchPrenatal InjuriesCloning, OrganismOocytesResearch Embryo CreationEthylene GlycolEmbryo LossMoralsFetal ViabilityGestational AgeReproductive TechniquesCryoprotective AgentsVitrificationHuman CharacteristicsAneuploidyCleavage Stage, OvumTrophoblastsGamete Intrafallopian TransferPregnancy OutcomeYolk SacMesodermGerm LayersMorphogenesisCatholicismCulture MediaFertilizationIn Situ HybridizationZona PellucidaNontherapeutic Human ExperimentationThiepinsTime FactorsFetusTotipotent Stem CellsEastern OrthodoxyEmbryonic Stem CellsChromosome AberrationsPropylene GlycolEndometriumReproductive Techniques, AssistedZebrafishBones of Upper ExtremityMolecular Sequence DataNotochordCell DifferentiationPhilosophy, MedicalGastrulaFallopian TubesRNA, MessengerBody PatterningHomeodomain ProteinsCell NucleusCell LineIn Situ Hybridization, FluorescenceImmunohistochemistryTissue SurvivalInfertility, FemaleBase SequenceTranscription FactorsPregnancy Trimester, FirstUrogenital SystemOrganogenesisCell LineageConjunctivitisAtlases as TopicNeural Tube DefectsChromosome Disorders