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FetusFetal Tissue TransplantationComplicityAborted FetusClinical Trials as TopicPregnancyMaternal-Fetal ExchangeDirected Tissue DonationPlacentaLifeAbortion, VeterinaryPersonhoodBeginning of Human LifeGestational AgeResearchFetal DiseasesFetal ResearchResearch DesignPregnancy, AnimalCivil RightsTherapeutic Human ExperimentationAmniotic FluidAbortion, InducedNontherapeutic Human ExperimentationPregnant WomenHydrops FetalisBrain Tissue TransplantationFetal DeathExtraembryonic MembranesFetal ResorptionEmbryonic and Fetal DevelopmentFetal WeightClinical Trials, Phase III as TopicCampylobacter fetusResearch Support as TopicTissue DistributionFetal DevelopmentLiverEthics, MedicalSocial Control, FormalTreatment OutcomeClinical Trials, Phase II as TopicTritrichomonas foetusMoral ObligationsEthics, ResearchAbortion, LegalPrenatal DiagnosisSheepResearch PersonnelAdvisory CommitteesClinical Trials, Phase I as TopicPlacenta DiseasesPregnancy Trimester, FirstFetal BloodChorionic VilliInformed ConsentControlled Clinical Trials as TopicUterusDouble-Blind MethodTime FactorsYolk SacTrophoblastsFederal GovernmentFetal ViabilityRNA, MessengerFetal Growth RetardationPregnancy Trimester, SecondNursing ResearchUltrasonography, PrenatalRandomized Controlled Trials as TopicPatient SelectionPregnancy Complications, InfectiousTranslational Medical ResearchMolecular Sequence DataInfant, NewbornBrainOrgan SpecificityBase SequenceTrisomyImmunohistochemistryMoralsHealth Services ResearchGenomic ImprintingEmbryo, MammalianNeoplasmsGovernment RegulationUnited StatesMulticenter Studies as TopicProspective StudiesKidneyAntibodies, MonoclonalAmnionGene Expression Regulation, DevelopmentalAbortion, SpontaneousUmbilical CordMaternal ExposurePolymerase Chain ReactionAntigens, NeoplasmPlacebosLung