Cervical RipeningLabor, InducedMusclesLabor OnsetPregnancy, ProlongedMuscle ProteinsPalpationMuscle, SmoothMuscle, SkeletalNatural ChildbirthMuscle Fibers, SkeletalMuscle, Smooth, VascularLabor Stage, FirstCervix UteriTerm BirthCervical Length MeasurementMuscle DevelopmentMuscle ContractionUterine MonitoringCesarean SectionDelivery, ObstetricCatholicismMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationParityMuscle Fibers, Slow-TwitchROC CurveMyocytes, Smooth MuscleMitochondria, MuscleOxytocicsUltrasonography, PrenatalNeck MusclesOculomotor MusclesMuscle, StriatedMuscle SpindlesMuscle RelaxationPregnancyRespiratory MusclesMuscle WeaknessPapillary MusclesPregnancy Trimester, ThirdAbdominal MusclesQuadriceps MuscleMuscle CellsMasseter MuscleFacial MusclesMasticatory MusclesIntercostal MusclesElectromyographyMuscular AtrophyIsometric ContractionPredictive Value of TestsTime FactorsSatellite Cells, Skeletal MusclePectoralis MusclesPregnancy OutcomeMuscular DiseasesOxytocinGestational AgeLabor, ObstetricPsoas MusclesPhysical ExaminationMyofibrilsTemporal MuscleHindlimbRabbitsElectric StimulationCells, CulturedMyosin Heavy ChainsCalciumPharyngeal MusclesDiaphragmBiomechanical PhenomenaMotor NeuronsPremature BirthGlycogenNeuromuscular JunctionMuscular Dystrophy, AnimalMyoblastsRats, Sprague-DawleyRNA, MessengerMuscle CrampActinsProspective StudiesRats, WistarRegenerationMice, Inbred mdxLogistic ModelsSarcomeresMyostatinMyoD ProteinLegPhysical ExertionMuscle Stretching ExercisesMyocardiumMuscle RigidityExerciseHypertrophyDystrophin