Embryo, MammalianClone CellsEmbryo ImplantationEmbryo, NonmammalianBlastocystChick EmbryoEmbryonic DevelopmentBlastomeresEmbryo ResearchFertilization in VitroEmbryonic and Fetal DevelopmentPregnancyEmbryo DispositionCryopreservationPersonhoodBeginning of Human LifeGene Expression Regulation, DevelopmentalZygoteEmbryo LossPregnancy RateMorulaEmbryo Culture TechniquesCulture TechniquesEmbryo TransferPreimplantation DiagnosisEctogenesisCleavage Stage, OvumCloning, OrganismSingle Embryo TransferOocytesMolecular Sequence DataSperm Injections, IntracytoplasmicMosaicismLifeEmbryologyValue of LifeBase SequenceAnatomy, ArtisticTheologyIncubatorsIn Situ HybridizationFetal ViabilityMesodermMorphogenesisResearch Embryo CreationZebrafishPrenatal InjuriesAmino Acid SequenceEthylene GlycolCloning, MolecularGastrulaGestational AgeFetal ResearchVitrificationRNA, MessengerCryoprotective AgentsReproductive TechniquesBody PatterningYolk SacAneuploidyFertilizationPregnancy OutcomeTrophoblastsMoralsCulture MediaTime FactorsGerm LayersHuman CharacteristicsCell DifferentiationZona PellucidaHomeodomain ProteinsNuclear Transfer TechniquesNotochordCell LineDNA, ComplementaryGamete Intrafallopian TransferEctodermTranscription FactorsFetusZebrafish ProteinsEmbryonic Stem CellsTotipotent Stem CellsMutationDNAFallopian TubesPhenotypeEndometriumChromosome AberrationsCell NucleusPropylene GlycolCatholicismXenopus ProteinsSeedsThiepinsImmunohistochemistryNontherapeutic Human ExperimentationGene ExpressionCell LineageEndodermDrosophila