Maternal-Fetal ExchangePlacentaFetusPlacental CirculationPregnancyCordocentesisFetal BloodBlood CirculationGestational AgeUmbilical ArteriesFetal Growth RetardationDuctus ArteriosusFetal HeartTrophoblastsUltrasonography, PrenatalUltrasonography, DopplerPre-EclampsiaChorionic VilliChoriocarcinomaBlood Flow VelocityAmniotic FluidHeart Rate, FetalPregnancy in DiabeticsFetal DiseasesSheepPregnancy Trimester, ThirdRegional Blood FlowPersistent Fetal Circulation SyndromeInfant, NewbornUterusPerfusionBiological TransportExtracorporeal CirculationPulmonary CirculationPulmonary Gas ExchangeDeuterium Exchange MeasurementExchange Transfusion, Whole BloodSister Chromatid ExchangeCollateral CirculationEnterohepatic CirculationCoronary CirculationCerebrovascular CirculationKineticsSplanchnic CirculationHydrogenBlood Circulation TimeSodium-Hydrogen AntiporterLiver CirculationHydrogen-Ion ConcentrationSodiumChromatography, Ion ExchangeRho Guanine Nucleotide Exchange FactorsDeuteriumTime FactorsMolecular Sequence DataIon Exchange ResinsCarbon DioxideSodium-Calcium ExchangerOxygenHemodynamicsAmino Acid SequenceDogsModels, BiologicalAnion Exchange ResinsAmilorideVascular ResistanceMagnetic Resonance SpectroscopyRabbitsBicarbonatesBlood PressureProtein BindingGuanosine DiphosphateCarrier ProteinsLiverErythrocytesProtonsAntiportersCross CirculationAssisted CirculationCalciumOxygen IsotopesChloride-Bicarbonate AntiportersOxygen ConsumptionChloridesModels, MolecularHeart ArrestPulmonary ArteryRenal CirculationTemperatureRecombination, GeneticCation Exchange ResinsProtein ConformationAdenosine TriphosphateCardiopulmonary ResuscitationWaterMutationTissue DistributionSwineHealth Insurance ExchangesProtein Structure, Tertiary