Embryo, MammalianEmbryo ImplantationBlastocystBlastomeresEmbryo ResearchEmbryonic DevelopmentFertilization in VitroEmbryo, NonmammalianPregnancyEmbryonic and Fetal DevelopmentChick EmbryoPersonhoodEmbryo TransferCryopreservationBeginning of Human LifeEmbryo DispositionEgg YolkEmbryo Culture TechniquesPregnancy RateEmbryo Implantation, DelayedZygoteOvumGene Expression Regulation, DevelopmentalPreimplantation DiagnosisCulture TechniquesSperm Injections, IntracytoplasmicLifeEgg ProteinsEndometriumCochlear ImplantationValue of LifeMorulaOocytesEctogenesisMosaicismAnatomy, ArtisticEmbryologyTheologyIncubatorsTrophoblastsEmbryo LossFertilizationEgg ShellSingle Embryo TransferTime FactorsLens Implantation, IntraocularEgg WhiteCleavage Stage, OvumCloning, OrganismFetal ResearchPrenatal InjuriesVitrificationReproductive TechniquesUterusFetal ViabilityGestational AgeResearch Embryo CreationPregnancy OutcomeEthylene GlycolZona PellucidaCryoprotective AgentsMoralsAneuploidyHuman CharacteristicsIn Situ HybridizationPacemaker, ArtificialGamete Intrafallopian TransferYolk SacStentsProsthesis DesignTreatment OutcomeMesodermGerm LayersMorphogenesisParasite Egg CountCulture MediaFetusFallopian TubesReproductive Techniques, AssistedCatholicismRNA, MessengerImmunohistochemistryThiepinsEmbryonic Stem CellsTotipotent Stem CellsNontherapeutic Human ExperimentationCell DifferentiationMolecular Sequence DataEastern OrthodoxyChromosome AberrationsProstheses and ImplantsPropylene GlycolDeciduaAortic Valve StenosisZebrafishNotochordGastrulaBones of Upper ExtremityDrug-Eluting StentsHomeodomain Proteins