Cervidil is a vaginal insert used in pregnant women to relax the cervix muscles in preparation for labor. Cervidil contains a medication referred to as prostaglandin, which prepares a woman for labor by softening the cervix in preparation for delivery. That is the reason Cervidil is specifically used for females who need to have their labor induced, but who have a cervix that is not ready for delivery. Cervidil is inserted by a physician and remains in its position until the expert removes it. For the first two hours after a woman has been given Cervidil, the woman needs to stay in bed so the infant's heart rate, as well as that of the mother's, can be monitored closely.