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FetusMaternal-Fetal ExchangePregnancyPlacentaFetal Tissue TransplantationGestational AgeFetal HypoxiaComplicityAborted FetusResearchOrgan SizeFetal DiseasesDirected Tissue DonationAutopsyLiverEmbryonic and Fetal DevelopmentFetal Organ MaturityLifeLungPersonhoodTissue and Organ ProcurementBeginning of Human LifeAbortion, VeterinaryBrainSheepOrgan TransplantationOrgan SpecificityResearch Support as TopicFetal ResearchResearch DesignEthics, ResearchPregnancy, AnimalResearch PersonnelCivil RightsMultiple Organ FailureTissue DistributionNontherapeutic Human ExperimentationTherapeutic Human ExperimentationNursing ResearchOrgan of CortiPregnant WomenAbortion, InducedAmniotic FluidBrain Tissue TransplantationExtraembryonic MembranesTranslational Medical ResearchHealth Services ResearchFetal ResorptionSocial Control, FormalHydrops FetalisEthics, MedicalMoral ObligationsGenetic ResearchFetal WeightAdvisory CommitteesMolecular Sequence DataInformed ConsentKidneyFetal DeathRNA, MessengerAbortion, LegalFetal DevelopmentGene Expression Regulation, DevelopmentalChorionic VilliPlacenta DiseasesFederal GovernmentUterusVomeronasal OrganBase SequenceYolk SacClinical Nursing ResearchImmunohistochemistryTime FactorsSubfornical OrganTrophoblastsMoralsFetal BloodDental ResearchPregnancy Trimester, FirstCommunity-Based Participatory ResearchTissue DonorsPelvic Organ ProlapsePregnancy Complications, InfectiousBehavioral ResearchQualitative ResearchEmbryo, MammalianFetal ViabilityAmino Acid SequenceDigestive SystemCell DifferentiationGovernment RegulationIn Situ HybridizationDisease Models, AnimalPolymerase Chain ReactionGenomic ImprintingHuman ExperimentationUnited StatesPrenatal DiagnosisGene ExpressionSpleen