Inclusion Criteria:  Gestational age (36-42 weeks). Prelabor rupture of membranes within the last 24hours Vertex presentation  Exclusion Criteria:  History of medical diseases (HTN, diabetes milletus, systemic lupus erythematosus, cardiac, etc.). Antepartum hemorrhage Chorioamnionitis / prelabor rupture of membranes >24hours Multiple pregnancy. Abnormal fetal heart rate pattern upon admission Intrauterine growth restriction Fetal malpresentation. Previous uterine scar. Estimated fetal weight more than 4kg. Patients already in labor Contraindication for prostaglandin/oxytocin use (allergy,..)