Objective To study the effects of premature rupture of membranes(PROM) on pregnancy outcomes.Methods Retrospective analysis is performed on delivery patients hospitalized with PROM(155 cases) and without PROM(564 cases with no pregnant complications).Results The rates of Cesarean section,preterm birth,asphyxiat and pneumonia of newborns in PROM group are significantly higher than those in the control group.Conclusions PROM is familiar complication associated with troubled baby delivery.