EclampsiaPremature BirthPregnancyMagnesium SulfateObstetric Labor, PrematureInfant, NewbornInfant, PrematurePre-EclampsiaGestational AgePregnancy OutcomeBirth WeightInfant, Low Birth WeightMaternal MortalityHELLP SyndromePregnancy ComplicationsFetal Membranes, Premature RuptureHypertension, Pregnancy-InducedTocolytic AgentsCerclage, CervicalInfant, Premature, DiseasesPuerperal DisordersBirth RateInfant MortalityInfant, Small for Gestational AgeUterine Cervical IncompetencePregnancy Complications, CardiovascularPrenatal CareAbruptio PlacentaeMaternal AgeRisk FactorsChorioamnionitisFetal DeathCervical Length MeasurementDelivery, ObstetricBirth CertificatesTerm BirthPregnancy, MultipleParityStillbirthCesarean SectionObstetric Labor ComplicationsPerinatal MortalityObstetricsCervix UteriInfant, Extremely PrematurePregnancy Trimester, SecondPregnancy, High-RiskHospitals, MaternityPosterior Leukoencephalopathy SyndromeCohort StudiesAmniotic FluidPregnancy Complications, InfectiousRetrospective StudiesBirth Order