It is possible to speed up the disappearance of the cervical canal, but the dosage needs to be controlled to avoid causing fetal hypoxia. When a pregnant woman is in labor, the cervical canal needs to disappear gradually, not quickly, or it will cause great risk of labor. Generally, the cervical canal disappears a little faster in menstruating women than in primiparous women. Hysteronics such as misoprostol help to soften the cervix as well as intensify contractions, which can contribute to a faster disappearance of the cervix. However, it is important not to overdose the contractions to avoid intrauterine hypoxia, which can lead to serious complications such as uterine rupture and embolism. Side effects of contractions include nausea, vomiting, drop in blood pressure and allergic reactions, etc. It is contraindicated for those who are not suitable for vaginal delivery, those who have a history of cesarean section, and those who suffer from severe hypertensive syndrome of pregnancy. In addition, the use of oxytocin carries a relatively high level of risk and should always be used under the supervision of a specialist.