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FetusChimerismFetomaternal TransfusionMaternal-Fetal ExchangeFetal ResearchPregnancyFetal Tissue TransplantationFetal Stem CellsComplicityAborted FetusPrenatal DiagnosisResearchPlacentaFamily PracticeDirected Tissue DonationLifeGestational AgePersonhoodErythroblastsAmniotic FluidFetal BloodBeginning of Human LifeAbortion, VeterinaryTrophoblastsPhysician's Practice PatternsPractice Guidelines as TopicIn Situ Hybridization, FluorescenceSex Determination AnalysisChimeraResearch Support as TopicResearch DesignY ChromosomePregnancy Trimester, FirstGeneral PracticeProfessional PracticeEthics, ResearchChromosomes, Human, YPolymerase Chain ReactionResearch PersonnelCloning, OrganismCivil RightsFetal HemoglobinNursing ResearchPractice Management, MedicalLiverPregnancy, AnimalHealth Knowledge, Attitudes, PracticeTherapeutic Human ExperimentationPrivate PracticeNontherapeutic Human ExperimentationCells, CulturedGenes, sryPregnant WomenAbortion, InducedEthics, MedicalTranslational Medical ResearchUnited StatesBrain Tissue TransplantationGreen Fluorescent ProteinsQuestionnairesCell SeparationSocial Control, FormalDNAExtraembryonic MembranesHealth Services ResearchFetal DiseasesPractice (Psychology)Rh-Hr Blood-Group SystemEvidence-Based PracticeAdvisory CommitteesFetal ResorptionBlood CellsHydrops FetalisGenetic ResearchCell DifferentiationTissue DistributionInformed ConsentRNA, MessengerAttitude of Health PersonnelQualitative ResearchStem CellsPregnancy ComplicationsImmunohistochemistryFetal WeightMoral ObligationsAbortion, LegalGreat BritainEmbryonic and Fetal DevelopmentClinical Nursing ResearchFetal DeathKaryotypingAneuploidyLungFederal GovernmentProfessional Practice LocationDental ResearchData CollectionChorionic VilliErythroid Precursor CellsFibroblasts