Mifepristone is useful when inducing labor at 24 weeks to soften the cervix and facilitate the doctor to complete the procedure. Oral mifepristone before inducing labor, its effects mainly include the following aspects. First, mifepristone has the effect of antagonizing progesterone, which can inhibit fetal growth and development, inhibit placental villus activity, and prepare for induction of labor. Second, mifepristone can increase the sensitivity of the uterus to prostaglandins and promote cervical ripening. Through these two effects, taking mifepristone before inducing labor paves the way for further management at a later stage. It is generally recommended to take 1 to 2 boxes of mifepristone orally before inducing labor, which is about 12 capsules. It is contraindicated for those who are allergic to the product, patients with heart, liver and kidney diseases, and those with adrenal cortex insufficiency. Patients who take mifepristone at 24 weeks for induced labor are advised to go to regular hospitals, consult with professional doctors, and cooperate with doctors to complete relevant examinations to avoid blind treatment.