Embryo, MammalianChick EmbryoCulture TechniquesSeedsEmbryo ImplantationEmbryo, NonmammalianBlastocystEmbryonic DevelopmentBlastomeresEmbryo ResearchFertilization in VitroEmbryonic and Fetal DevelopmentPregnancyCryopreservationEmbryo DispositionPersonhoodGene Expression Regulation, DevelopmentalEmbryo TransferBeginning of Human LifePregnancy RateEmbryo LossZygoteEmbryo Implantation, DelayedEmbryo Culture TechniquesMorulaCleavage Stage, OvumPreimplantation DiagnosisSperm Injections, IntracytoplasmicEctogenesisSingle Embryo TransferOocytesTime FactorsCloning, OrganismEndometriumLifeMosaicismTrophoblastsEmbryologyValue of LifeIn Situ HybridizationCochlear ImplantationIncubatorsFetal ViabilityAnatomy, ArtisticTheologyVitrificationPregnancy OutcomeReproductive TechniquesMesodermMorphogenesisGestational AgeUterusResearch Embryo CreationLens Implantation, IntraocularZebrafishPrenatal InjuriesEthylene GlycolCryoprotective AgentsFertilizationGastrulaFetal ResearchBody PatterningYolk SacAneuploidyZona PellucidaRNA, MessengerMolecular Sequence DataMoralsCulture MediaGerm LayersHomeodomain ProteinsCell DifferentiationHuman CharacteristicsFallopian TubesEctodermImmunohistochemistryTreatment OutcomeGamete Intrafallopian TransferNuclear Transfer TechniquesNotochordBase SequencePacemaker, ArtificialFetusEmbryonic Stem CellsTranscription FactorsZebrafish ProteinsStentsEndodermProsthesis DesignTotipotent Stem CellsCell NucleusPropylene GlycolCatholicismChromosome AberrationsDeciduaXenopus ProteinsThiepinsCell LineageReproductive Techniques, AssistedMutation