Most patients with cervical insufficiency have a higher chance of having a miscarriage around 18-20 weeks. In patients with cervical insufficiency, the uterine pressure on the cervix becomes more pronounced as the baby gets older in months, which can lead to an opening of the uterine opening, which can cause a miscarriage. Therefore, for patients who have been diagnosed with cervical insufficiency prenatally, prophylactic cervical cerclage can be considered before pregnancy, or at 12-16 weeks of pregnancy, which can reduce the probability of miscarriage and achieve the purpose of prolonging the gestational weeks. However, there are some patients with cervical insufficiency in whom the effect of cervical cerclage is not particularly good, and if this is the case, the addition of more effective, contraction-suppressing medications is also needed.