Embryo, MammalianEmbryo ImplantationBlastocystBlastomeresEmbryo ResearchEmbryonic DevelopmentEmbryo, NonmammalianFertilization in VitroGenetic VariationChick EmbryoEmbryonic and Fetal DevelopmentPersonhoodBeginning of Human LifePregnancyEmbryo DispositionCryopreservationEmbryo Culture TechniquesEmbryo TransferPregnancy RateZygoteLifePreimplantation DiagnosisGene Expression Regulation, DevelopmentalCulture TechniquesValue of LifeAnatomy, ArtisticMosaicismTheologyEctogenesisMorulaEmbryologyIncubatorsSperm Injections, IntracytoplasmicSingle Embryo TransferFetal ResearchCloning, OrganismPrenatal InjuriesOocytesResearch Embryo CreationEthylene GlycolEmbryo LossGestational AgeMoralsFetal ViabilityReproductive TechniquesCryoprotective AgentsVitrificationHuman CharacteristicsAneuploidyCleavage Stage, OvumTime FactorsTrophoblastsMolecular Sequence DataGamete Intrafallopian TransferPregnancy OutcomeYolk SacMesodermCulture MediaMorphogenesisGerm LayersFertilizationIn Situ HybridizationZona PellucidaCatholicismFetusThiepinsTotipotent Stem CellsBase SequenceNontherapeutic Human ExperimentationPhenotypeEmbryonic Stem CellsEastern OrthodoxyChromosome AberrationsEndometriumPropylene GlycolBones of Upper ExtremityReproductive Techniques, AssistedZebrafishRNA, MessengerNotochordCell DifferentiationFallopian TubesGastrulaBody PatterningHomeodomain ProteinsMutationCell NucleusCell LinePhilosophy, MedicalIn Situ Hybridization, FluorescenceTranscription FactorsImmunohistochemistryAmino Acid SequenceTissue SurvivalInfertility, FemalePregnancy Trimester, FirstModels, BiologicalUrogenital SystemAtlases as TopicCell Lineage