There were no significant differences between the two groups with regard to the interval from the start of induction to vaginal delivery ( 13.2 3.07 h in the vaginal group vs. 13.1 3.46 h in the sublingual group ) , duration of active phase , Bishop Scores after 4h , and rate of the vaginal delivery under 12 h. Also , the rate of hyperstimulation , tachysystole , type of delivery , cause of cesarean section , Apgar scores less than 7 and admission to the NICU were similar in these two groups .