Embryo, MammalianEmbryo ImplantationEmbryo, NonmammalianBlastocystChick EmbryoEmbryonic DevelopmentBlastomeresEmbryo ResearchFertilization in VitroEmbryonic and Fetal DevelopmentClone CellsPregnancyEmbryo DispositionCryopreservationPersonhoodGene Expression Regulation, DevelopmentalBeginning of Human LifeZygoteEmbryo LossPregnancy RateMorulaCulture TechniquesEmbryo Culture TechniquesEmbryo TransferPreimplantation DiagnosisMolecular Sequence DataEctogenesisCleavage Stage, OvumCloning, OrganismOocytesSingle Embryo TransferSperm Injections, IntracytoplasmicMosaicismLifeBase SequenceEmbryologyValue of LifeAnatomy, ArtisticTheologyIncubatorsIn Situ HybridizationFetal ViabilityAmino Acid SequenceMorphogenesisZebrafishMesodermResearch Embryo CreationCloning, MolecularPrenatal InjuriesRNA, MessengerEthylene GlycolGestational AgeGastrulaFetal ResearchVitrificationCryoprotective AgentsBody PatterningReproductive TechniquesTime FactorsYolk SacAneuploidyFertilizationPregnancy OutcomeTrophoblastsMoralsCulture MediaCell DifferentiationHuman CharacteristicsGerm LayersHomeodomain ProteinsCell LineZona PellucidaDNA, ComplementaryTranscription FactorsNuclear Transfer TechniquesMutationNotochordEctodermGamete Intrafallopian TransferFetusPhenotypeZebrafish ProteinsEmbryonic Stem CellsDNATotipotent Stem CellsFallopian TubesCell NucleusEndometriumChromosome AberrationsImmunohistochemistryGene ExpressionPropylene GlycolCatholicismXenopus ProteinsSeedsNontherapeutic Human ExperimentationThiepinsCell LineageDrosophilaIn Situ Hybridization, Fluorescence