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FetusFetal Tissue TransplantationComplicityAborted FetusClinical Trials as TopicDirected Tissue DonationMaternal-Fetal ExchangePregnancyPlacentaLifePersonhoodAbortion, VeterinaryBeginning of Human LifeResearchGestational AgeFetal ResearchResearch DesignPregnancy, AnimalCivil RightsTherapeutic Human ExperimentationNontherapeutic Human ExperimentationPregnant WomenAbortion, InducedAmniotic FluidBrain Tissue TransplantationClinical Trials, Phase III as TopicExtraembryonic MembranesResearch Support as TopicFetal DiseasesFetal ResorptionEthics, MedicalTissue DistributionHydrops FetalisSocial Control, FormalClinical Trials, Phase II as TopicLiverTreatment OutcomeFetal WeightEthics, ResearchEmbryonic and Fetal DevelopmentMoral ObligationsResearch PersonnelFetal DeathAdvisory CommitteesClinical Trials, Phase I as TopicAbortion, LegalInformed ConsentControlled Clinical Trials as TopicChorionic VilliPlacenta DiseasesDouble-Blind MethodFetal DevelopmentFederal GovernmentTime FactorsYolk SacTrophoblastsNursing ResearchUterusRandomized Controlled Trials as TopicPatient SelectionPregnancy Complications, InfectiousFetal BloodRNA, MessengerTranslational Medical ResearchPregnancy Trimester, FirstMolecular Sequence DataSheepOrgan SpecificityFetal ViabilityBrainHealth Services ResearchBase SequenceMoralsGovernment RegulationNeoplasmsMulticenter Studies as TopicUnited StatesPrenatal DiagnosisImmunohistochemistryGenomic ImprintingAntibodies, MonoclonalKidneyEmbryo, MammalianAntigens, NeoplasmPlacebosAmnionGene Expression Regulation, DevelopmentalClinical ProtocolsClinical Trials Data Monitoring CommitteesProspective StudiesGenetic ResearchPolymerase Chain ReactionFollow-Up StudiesBiomedical ResearchTissue and Organ ProcurementRisk AssessmentClinical Trials, Phase IV as TopicAbortion, SpontaneousInfant, NewbornPersonal Autonomy