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FetusFetal Tissue TransplantationComplicityAborted FetusClinical Trials as TopicDirected Tissue DonationMaternal-Fetal ExchangePregnancyPlacentaLifePersonhoodAbortion, VeterinaryBeginning of Human LifeResearchGestational AgeFetal ResearchResearch DesignCivil RightsPregnancy, AnimalTherapeutic Human ExperimentationNontherapeutic Human ExperimentationPregnant WomenAbortion, InducedAmniotic FluidBrain Tissue TransplantationClinical Trials, Phase III as TopicExtraembryonic MembranesResearch Support as TopicFetal DiseasesFetal ResorptionEthics, MedicalTissue DistributionHydrops FetalisTreatment OutcomeSocial Control, FormalClinical Trials, Phase II as TopicLiverEthics, ResearchFetal WeightEmbryonic and Fetal DevelopmentMoral ObligationsResearch PersonnelFetal DeathAdvisory CommitteesClinical Trials, Phase I as TopicAbortion, LegalInformed ConsentControlled Clinical Trials as TopicTime FactorsChorionic VilliDouble-Blind MethodPlacenta DiseasesFetal DevelopmentFederal GovernmentYolk SacNursing ResearchRandomized Controlled Trials as TopicTrophoblastsUterusPatient SelectionTranslational Medical ResearchRNA, MessengerPregnancy Complications, InfectiousFetal BloodPregnancy Trimester, FirstMolecular Sequence DataUnited StatesSheepNeoplasmsOrgan SpecificityBrainHealth Services ResearchFetal ViabilityBase SequenceGovernment RegulationMulticenter Studies as TopicMoralsPrenatal DiagnosisAntibodies, MonoclonalImmunohistochemistryGenomic ImprintingKidneyEmbryo, MammalianAntigens, NeoplasmGene Expression Regulation, DevelopmentalProspective StudiesClinical ProtocolsPlacebosBiomedical ResearchAmnionFollow-Up StudiesClinical Trials Data Monitoring CommitteesGenetic ResearchInfant, NewbornRisk AssessmentPolymerase Chain ReactionTissue and Organ ProcurementAbortion, SpontaneousPersonal AutonomyClinical Trials, Phase IV as Topic