IndomethacinInfant, PrematurePremature BirthObstetric Labor, PrematureInfant, NewbornInfant, Premature, DiseasesGestational AgeCyclooxygenase InhibitorsProstaglandinsAnti-Inflammatory Agents, Non-SteroidalPregnancyFetal Membranes, Premature RuptureDinoprostoneChorioamnionitisProstaglandins EDuctus Arteriosus, PatentTocolytic AgentsTerm BirthProstaglandin-Endoperoxide SynthasesInfant, Low Birth WeightInfant, Extremely PrematurePregnancy OutcomeInfant, Very Low Birth WeightProstaglandin AntagonistsCyclooxygenase 14,5-Dihydro-1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-amineAmniotic FluidRespiratory Distress Syndrome, NewbornIbuprofenStomach UlcerArachidonic AcidsBirth WeightBronchopulmonary DysplasiaInfant, Small for Gestational Age6-Ketoprostaglandin F1 alphaIntensive Care Units, NeonatalArachidonic AcidGastric MucosaEnterocolitis, NecrotizingMasoprocolTocolysisDose-Response Relationship, DrugCyclooxygenase 2Meclofenamic AcidProstaglandins FEpoprostenolDuctus ArteriosusLipoxygenase InhibitorsIntensive Care, NeonatalBradykininPregnancy ComplicationsCyclooxygenase 2 InhibitorsAspirin16,16-Dimethylprostaglandin E2VasodilationNitric OxideDevelopmental DisabilitiesBiological FactorsChild DevelopmentLeukomalacia, PeriventricularNitrobenzenes5,8,11,14-Eicosatetraynoic AcidNG-Nitroarginine Methyl EsterNitroarginineDinoprostPregnancy Trimester, SecondThromboxane B2Rats, WistarInfant Nutritional Physiological PhenomenaMilk, HumanInfant, Extremely Low Birth WeightCervix UteriExtraembryonic MembranesTime FactorsProspective StudiesUterine Cervical IncompetenceGuinea PigsInfant MortalityVasoconstrictionCerclage, CervicalMuscle RelaxationThromboxane A2AcetylcholineRisk FactorsProstaglandins E, SyntheticPregnancy Complications, InfectiousUterine ContractionRabbitsRetinopathy of PrematurityRats, Inbred StrainsEndothelium, VascularMuscle ContractionInfant CareCervical Length MeasurementSRS-AInfant BehaviorSulfonamidesStillbirthAnti-Inflammatory AgentsRats, Sprague-Dawley