Preimplantation DiagnosisPregnancyEmbryo, MammalianEmbryo ImplantationEmbryo, NonmammalianBlastocystChick EmbryoEmbryonic DevelopmentBlastomeresEmbryo ResearchFertilization in VitroEmbryonic and Fetal DevelopmentEmbryo DispositionCryopreservationPersonhoodBeginning of Human LifeGene Expression Regulation, DevelopmentalZygoteEmbryo LossPregnancy RateMorulaEmbryo Culture TechniquesEmbryo TransferCulture TechniquesEctogenesisCleavage Stage, OvumSingle Embryo TransferOocytesSperm Injections, IntracytoplasmicCloning, OrganismLifeMosaicismEmbryologyValue of LifeAnatomy, ArtisticTheologyIncubatorsFetal ViabilityIn Situ HybridizationResearch Embryo CreationMesodermMorphogenesisZebrafishPrenatal InjuriesEthylene GlycolFetal ResearchGestational AgeVitrificationGastrulaCryoprotective AgentsReproductive TechniquesBody PatterningYolk SacPregnancy OutcomeFertilizationAneuploidyTrophoblastsMoralsGerm LayersCulture MediaHuman CharacteristicsZona PellucidaTime FactorsMolecular Sequence DataHomeodomain ProteinsNotochordNuclear Transfer TechniquesGamete Intrafallopian TransferEctodermRNA, MessengerCell DifferentiationZebrafish ProteinsEmbryonic Stem CellsTranscription FactorsTotipotent Stem CellsFetusFallopian TubesEndometriumBase SequencePropylene GlycolCatholicismXenopus ProteinsThiepinsCell NucleusChromosome AberrationsNontherapeutic Human ExperimentationSeedsEndodermEastern OrthodoxyImmunohistochemistryParthenogenesisInfertility, FemaleEmbryonic InductionCell LineageBlastodermDrosophilaSea UrchinsMutationDrosophila ProteinsPhenotype