Bed RestDiabetes, GestationalPregnancyGlucose Tolerance TestHead-Down TiltWeightlessness SimulationPregnancy OutcomePregnancy ComplicationsWeightlessness CountermeasuresRestPregnancy, AnimalCardiovascular DeconditioningPregnancy, EctopicSpace FlightBedsPregnancy Trimester, FirstWeightlessnessPregnancy Trimester, ThirdPregnancy RatePregnancy Complications, CardiovascularPregnancy TrimestersPregnancy TestsPregnancy, MultipleOrthostatic IntolerancePregnancy in DiabeticsPregnancy, TubalPregnancy Trimester, SecondPregnancy Complications, NeoplasticPregnancy in AdolescenceLower Body Negative PressurePregnancy Complications, InfectiousAbortion, SpontaneousPregnancy ProteinsPregnancy, UnplannedPregnancy, High-RiskPregnancy, UnwantedGestational AgePregnancy Complications, HematologicInfant, NewbornTime FactorsBed OccupancyPlacentaPre-EclampsiaPregnancy, ProlongedPregnancy, TwinPlasma VolumeFetal DeathSupine PositionMuscular AtrophyExerciseUterusMuscle, SkeletalAbortion, InducedEarly AmbulationPregnancy Complications, ParasiticPregnancy, AbdominalPregnancy MaintenanceHypotension, OrthostaticUltrasonography, PrenatalEmbryo ImplantationPrenatal CareEmbryo TransferFertilization in VitroMaternal-Fetal ExchangeHypovolemiaParityVascular CapacitanceUterine Cervical IncompetencePrenatal Exposure Delayed EffectsAbortion, ThreatenedBirth WeightAmino Acids, EssentialImmobilization