alpha-FetoproteinsFetusFetal ProteinsPregnancy, AnimalPregnancyEnergy MetabolismUterine ContractionLipid MetabolismUterusRats, Sprague-DawleyMyometriumPlacentaMaternal-Fetal ExchangeRats, Inbred StrainsPrenatal Exposure Delayed EffectsRats, WistarProgesteroneLiverGlucoseMetabolismPregnancy Complications, CardiovascularFetal WeightGestational AgeAbnormalities, Drug-InducedBody WeightPlacental Function TestsLabor, ObstetricOrgan SizeFetal ResorptionMifepristoneAnimals, NewbornRNA, MessengerFetal DevelopmentEstradiolCorpus LuteumTime FactorsPregnancy ComplicationsGravidityPre-EclampsiaOxytocinInsulinLactationBiotransformationLitter SizeFetal Growth RetardationDiet, Protein-Restricted20-Hydroxysteroid DehydrogenasesOvum TransportEmbryonic and Fetal DevelopmentKidneyRelaxinHypertension, Pregnancy-InducedDose-Response Relationship, DrugPlasma VolumeChromatography, High Pressure LiquidMicrosomes, LiverCytochrome P-450 Enzyme SystemTeratogens20-alpha-DihydroprogesteroneFatty AcidsGlycolysisOxidation-ReductionPlacental LactogenProstaglandins FKineticsMetabolic Networks and PathwaysMaternal ExposureBlood PressureBlood GlucoseCastrationTocolytic AgentsMetrial GlandTissue DistributionBrainAmniotic FluidMetabolism, Inborn ErrorsNG-Nitroarginine Methyl EsterNitric OxideOvaryLuteal CellsMetabolic Clearance RatePseudopregnancyTriglyceridesDiestrusCholesterolEnzyme InhibitorsAlismataceaeDietOxygen ConsumptionCarcinoma 256, WalkerPregnancy in DiabeticsRandom AllocationDisease Models, AnimalFetal Nutrition DisordersOvariectomy20-alpha-Hydroxysteroid DehydrogenasePlacental InsufficiencyRitodrineCervical RipeningReceptors, Oxytocin