Supine PositionPregnancyPregnancy ComplicationsPrenatal Exposure Delayed EffectsProne PositionPregnancy OutcomePregnancy Trimester, ThirdInflammationMaternal ExposurePatient PositioningInfant, NewbornPostureRisk FactorsPregnancy, AnimalPregnancy, EctopicTilt-Table TestPregnancy Trimester, FirstPregnancy RateHead-Down TiltHeart RatePregnancy Complications, CardiovascularInflammation MediatorsPregnancy TrimestersPregnancy TestsSupinationHypotension, OrthostaticPregnancy, MultiplePregnancy in DiabeticsPregnancy Trimester, SecondPregnancy, TubalBlood PressureNephrostomy, PercutaneousGravitationPregnancy Complications, NeoplasticPregnancy in AdolescenceLungPregnancy Complications, InfectiousTime FactorsRespiratory MechanicsAbortion, SpontaneousAutonomic Nervous SystemPregnancy ProteinsRespirationProspective StudiesGestational AgePregnancy, UnplannedPregnancy, High-RiskIndoraminPregnancy, UnwantedValsalva ManeuverReference ValuesPressureHemodynamicsBaroreflexSyncopePregnancy Complications, HematologicDizzinessMice, Inbred C57BLMovementPlacentaCardiac OutputSyncope, VasovagalTidal VolumePre-EclampsiaSudden Infant DeathExpiratory Reserve VolumeDisease Models, AnimalLegPregnancy, ProlongedPulmonary Gas ExchangePregnancy, TwinBlood Flow VelocityLung Volume MeasurementsHeadEsophagusFluid ShiftsOxygenFetal DeathPulmonary CirculationCytokinesTechnetium Tc 99m Aggregated AlbuminPalate, SoftCase-Control StudiesEsophageal pH MonitoringUterusRestMolecular Sequence DataSleepAbortion, InducedAirway ResistanceRetrospective StudiesPregnancy, AbdominalRegional Blood FlowPregnancy Complications, ParasiticInhalationThoracic WallFunctional Residual CapacitySleep ParalysisUltrasonography, PrenatalPregnancy Maintenance