A balloon is placed in the cervix when the mother’s cervix is not ripe enough for labor, and if labor is desired, the cervix needs to be ripened first, by placing a balloon in the cervix to mechanically dilate the cervix. The placement of a balloon through the cervix is one of the most common methods used in obstetrics to promote cervical ripening. If the cervix is not ripe, i.e., Bishop’s score <6, cervical ripening needs to be facilitated before induction of labor with uterine contractions, where the most commonly used methods of facilitating cervical ripening include placement of a cervical balloon and vaginal preparations of PGE2 such as dinoprostenol suppositories. Cervical balloon placement is an effective method to promote cervical ripening by softening the cervix through mechanical dilatation, which greatly improves the chances of inducing labor, but cervical balloon placement is not suitable for patients with inflammation of the reproductive tract, premature rupture of membranes, and so on. The decision of whether or not to induce labor, and which method of induction is more appropriate, should be made after a doctor's evaluation.