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FetusFetal Tissue TransplantationComplicityAborted FetusResearchDirected Tissue DonationMaternal-Fetal ExchangePregnancyPlacentaLifePersonhoodBeginning of Human LifeAbortion, VeterinaryResearch Support as TopicFetal ResearchResearch DesignGestational AgeEthics, ResearchResearch PersonnelCivil RightsPregnancy, AnimalNontherapeutic Human ExperimentationTherapeutic Human ExperimentationPregnant WomenNursing ResearchAbortion, InducedAmniotic FluidEthics, MedicalBrain Tissue TransplantationTranslational Medical ResearchExtraembryonic MembranesSocial Control, FormalHealth Services ResearchFetal DiseasesFetal ResorptionHydrops FetalisGenetic ResearchTissue DistributionMoral ObligationsLiverInformed ConsentAdvisory CommitteesFetal WeightEmbryonic and Fetal DevelopmentFetal DeathAbortion, LegalFederal GovernmentChorionic VilliPlacenta DiseasesFetal DevelopmentClinical Nursing ResearchUnited StatesYolk SacDental ResearchTrophoblastsMoralsUterusMolecular Sequence DataBehavioral ResearchRNA, MessengerCommunity-Based Participatory ResearchFetal BloodGovernment RegulationPregnancy Trimester, FirstPregnancy Complications, InfectiousBrainQualitative ResearchOrgan SpecificitySheepBase SequenceHuman ExperimentationFetal ViabilityPersonal AutonomyPrenatal DiagnosisGenomic ImprintingEmbryo, MammalianImmunohistochemistryGene Expression Regulation, DevelopmentalTissue and Organ ProcurementBioethical IssuesKidneyTime FactorsAmnionAcademies and InstitutesResource AllocationPolymerase Chain ReactionEmpirical ResearchQuestionnairesMaternal ExposureAntigens, NeoplasmHistory, 20th CenturyAbortion, SpontaneousEmbryo ResearchInfant, NewbornNational Institutes of Health (U.S.)Amino Acid SequenceLungTrisomyDNA ProbesRisk Assessment