Results: labour induction successful, the remove cervical opening ≥ 3 cm, Bishop ≥ 8 after 4.97 ± 1.56 h in 87.1% at pregnant women; labour induction successful, the cervix is ​​fully opened after 7.73 ± 2, 7 h in 84.3%; labour induction successful and vaginal delivery after 8.39 ± 3.52 h in 82.9% of pregnant women.