The main etiologic factor of Preterm premature rupture of mambranes ( PPROM ) before 37 weeks of pregnancy is not well understood, but early dilatation of the cervix, infection of uterus and fetus and previous preterm delivery are mentioned as the reasons for premature rupture of the amniotic sac Also several risk factors have been mentioned for PPROM .The most important risk factors are history of previous preterm rupture or endometritis , nutritional deficiency , and lower socio- economic status.PPROM has dreaded consequences for mother and fetus physiologic disturbances occuring in both of them. Maternal consequences consist of delivery complecations , emergent cesarean section , corioamnionitis , endometritis, sepsis and even death .Fetal complecations include preterm labor, preterm abruption , cord prolapse , respiratory distress and necrotizing enterocolitis .In this study, we are comparing maternal and fetal complecation in PPROM cases with termination of 34 or 36 weeks of pregnancy .40 cases of PPROM during the study period of May 2014 to May 2015 in Tabriz Alzahra hospital and Taleghani hospital will be included .Patients will be randomized to two groups (20 each).Exclusion criteria are an underlying disease (such as hypertension , diabetes), other conditions associated with pregnancy (such as preeclampsia and eclampsia),PPROM with termination of pregnancy in the previous months , and major life-threatening fetal anomalies. Termination of pregnancy will be done at 34 weeks in group A and at 36 weeks in group B . Maternal (delivery related complications , need for emergent cesarian section , corioamnionitis, endometritis , sepsis , and maternal mortality) and fetal (preterm delivery , preterm abruption, cord prolapse , respiratory distress, and necroziting enterocolitis) outcomes will be compared in two groups.