Spinal CordSpinal Cord InjuriesFetusChimerismFetomaternal TransfusionMaternal-Fetal ExchangeFetal ResearchPregnancyFetal Tissue TransplantationFetal Stem CellsSpinal Cord DiseasesComplicitySpinal Cord CompressionSpinal Cord NeoplasmsAborted FetusPrenatal DiagnosisResearchPlacentaSpinal Cord IschemiaDirected Tissue DonationFetal BloodInjections, SpinalParaplegiaLifeGestational AgeSpinal Nerve RootsErythroblastsSpinal NervesPersonhoodAmniotic FluidMotor NeuronsBeginning of Human LifeAbortion, VeterinarySpinal Cord RegenerationTrophoblastsUmbilical CordSpinal CanalChimeraSpinal NeoplasmsCervical VertebraeQuadriplegiaIn Situ Hybridization, FluorescenceAnesthesia, SpinalSex Determination AnalysisThoracic VertebraeRats, Sprague-DawleySpinal DiseasesY ChromosomeCells, CulturedPregnancy Trimester, FirstPosterior Horn CellsLaminectomyResearch Support as TopicImmunohistochemistryLumbosacral RegionPolymerase Chain ReactionRecovery of FunctionResearch DesignNerve RegenerationSpinal StenosisAxonsChromosomes, Human, YLocomotionGanglia, SpinalSpinal Cord StimulationSpinal FusionCloning, OrganismEthics, ResearchSpinal InjuriesDisease Models, AnimalFetal HemoglobinLiverGreen Fluorescent ProteinsAnterior Horn CellsResearch PersonnelMyelitisCell DifferentiationCivil RightsNeuronsPregnancy, AnimalTime FactorsStem CellsCordotomyPainParalysisRNA, MessengerNontherapeutic Human ExperimentationTherapeutic Human ExperimentationGenes, sryBrain Tissue TransplantationMuscular Atrophy, SpinalNursing ResearchMice, Inbred C57BLPregnant WomenTissue DistributionElectric Stimulation TherapyHyperalgesiaAbortion, InducedCell SeparationNeuralgia