OocytesEmbryo, MammalianBlastocystEmbryo ImplantationBlastomeresEmbryonic DevelopmentEmbryo ResearchEmbryo, NonmammalianEmbryonic and Fetal DevelopmentFertilization in VitroChick EmbryoCryopreservationPregnancyPersonhoodEmbryo TransferBeginning of Human LifeEmbryo Culture TechniquesEmbryo DispositionZygoteOogenesisPregnancy RateSperm Injections, IntracytoplasmicOocyte DonationGene Expression Regulation, DevelopmentalXenopus laevisMorulaCulture TechniquesPreimplantation DiagnosisFertilizationEctogenesisLifeValue of LifeOocyte RetrievalMeiosisMosaicismAnatomy, ArtisticTheologyCleavage Stage, OvumIncubatorsEthylene GlycolCryoprotective AgentsVitrificationEmbryologyZona PellucidaXenopusIn Vitro Oocyte Maturation TechniquesSingle Embryo TransferReproductive TechniquesFetal ResearchPrenatal InjuriesMicroinjectionsAneuploidyCloning, OrganismResearch Embryo CreationEmbryo LossFetal ViabilityParthenogenesisPregnancy OutcomeGestational AgeMoralsOvumCulture MediaHuman CharacteristicsGamete Intrafallopian TransferReproductive Techniques, AssistedRNA, MessengerMetaphaseCell NucleusMolecular Sequence DataCumulus CellsTime FactorsTrophoblastsNuclear Transfer TechniquesInfertility, FemaleIn Situ HybridizationPropylene GlycolYolk SacOvaryMesodermMorphogenesisFetusGerm LayersSperm-Ovum InteractionsCatholicismChromosome AberrationsTotipotent Stem CellsThiepinsNontherapeutic Human ExperimentationEmbryonic Stem CellsBase SequenceFallopian TubesCytoplasmSpermatozoaZebrafishEndometriumEastern OrthodoxyXenopus ProteinsCell DifferentiationCells, CulturedAmino Acid Sequence