Cleavage Stage, OvumBlastocystBlastomeresEmbryo, MammalianEmbryo ImplantationEmbryonic DevelopmentEmbryo, NonmammalianEmbryo Culture TechniquesFertilization in VitroEmbryo TransferCryopreservationEmbryonic and Fetal DevelopmentPreimplantation DiagnosisZygoteEmbryo ResearchPregnancyVitrificationPregnancy RateOocytesMorulaChick EmbryoGene Expression Regulation, DevelopmentalPersonhoodFetal ViabilityBeginning of Human LifeSperm Injections, IntracytoplasmicUrochordataEmbryo DispositionSea UrchinsGerm LayersGastrulaPolar BodiesMolecular Sequence DataBlastulaFertilizationAneuploidyAmino Acid SequenceXenopus ProteinsEmbryonic InductionXenopus laevisBase SequenceOvumLifeIn Situ HybridizationCulture TechniquesValue of LifeMesodermBody PatterningMosaicismAnatomy, ArtisticZebrafishTheologyEctogenesisCell NucleusEmbryologyMorphogenesisEctodermIncubatorsRNA, MessengerTime FactorsOctamer Transcription Factor-3DNA CleavageXenopusSingle Embryo TransferFetal ResearchCloning, OrganismPrenatal InjuriesEthylene GlycolZebrafish ProteinsResearch Embryo CreationTranscription FactorsEmbryo LossIn Situ Hybridization, FluorescenceMoralsCryoprotective AgentsGestational AgeReproductive TechniquesPregnancy, MultipleCell DifferentiationHuman CharacteristicsCytoplasmTrophoblastsOogenesisCell LineGamete Intrafallopian TransferPregnancy OutcomeYolk SacSignal TransductionCulture MediaCells, CulturedDNA-Binding ProteinsTranscription, GeneticZona PellucidaRNA CleavageCatholicismMutationThiepinsFetusTotipotent Stem CellsNontherapeutic Human Experimentation