The purpose of this study was to compare the efficacy of metreurynter with laminaria tents as a pre-induction priming method for unripe cervix. Fifty-six nulliparous women with a Bishop score of ≦ 4 were enrolled and received either metod in the evening before elective induction. All cases were singleton and vertex pressentation. The cervical ripening effect was more prominent in the metreurynter group. And also the incidence of induction of delivery time of > 12h and the Cesarean section rate were significantly lower in the metreurynter group than in the laminaria group.