FetusFetal Tissue TransplantationComplicityAborted FetusDirected Tissue DonationMaternal-Fetal ExchangePlacentaLifePregnancyPersonhoodAbortion, VeterinaryBeginning of Human LifeGestational AgeFetal ResearchPregnancy, AnimalCivil RightsPregnant WomenAbortion, InducedAmniotic FluidBrain Tissue TransplantationTherapeutic Human ExperimentationExtraembryonic MembranesNontherapeutic Human ExperimentationFetal DiseasesFetal ResorptionHydrops FetalisTissue DistributionSocial Control, FormalLiverFetal WeightEmbryonic and Fetal DevelopmentFetal DeathAbortion, LegalEthics, MedicalChorionic VilliPlacenta DiseasesMoral ObligationsAdvisory CommitteesFetal DevelopmentYolk SacTrophoblastsFederal GovernmentUterusFetal BloodPregnancy Trimester, FirstRNA, MessengerPregnancy Complications, InfectiousFetal ViabilityOrgan SpecificitySheepMolecular Sequence DataGenomic ImprintingBase SequencePrenatal DiagnosisMoralsAmnionEmbryo, MammalianGene Expression Regulation, DevelopmentalImmunohistochemistryKidneyBrainTissue and Organ ProcurementAntigens, NeoplasmMaternal ExposureResource AllocationTrisomyAbortion, SpontaneousDNA ProbesGovernment RegulationPolymerase Chain ReactionBlotting, NorthernLungDNA, ComplementaryHorse DiseasesMosaicismUmbilical CordInformed ConsentHorsesFetal Growth RetardationPregnancy Trimester, SecondDigestive SystemAdrenal GlandsAmino Acid SequencePersonal AutonomyCloning, MolecularAntibodies, MonoclonalInsulin-Like Growth Factor IIGene ExpressionCattleIn Situ HybridizationCell DifferentiationCells, CulturedSomatomedinsProteinsImmunoenzyme TechniquesReverse Transcriptase Polymerase Chain ReactionMice, Inbred ICRCell LineThymus GlandDNA