LATERPREGNANCYCOMPLICATIONS,PrematuredeliveryProlongedpregnancyPrematureRuptureofMembranes(PROM),Content,PRETERMLABOR早产,PretermLabor:Laboroccursafter28weeksbutbefore37weeks(ie.196258days)gestation.Infantsbornduringthesephaseareprematureinfants.Theprematureinfantsweightisbetween1000and2499g.Theprognosisoftheprematureinfantiscorrelatedwithitsgestationalage,weight.,Definition:,Etiology:,1.Obstetriccomplications产科并发症2.Medicalcomplications内科并发症3.Surgicalcomplications外科并发症4.Genitaltractanomalies生