Short cervix in women may be caused by the following: 1. Abnormal congenital development, the normal length of the cervix should be 30-35mm, if it is lower than 25mm, it should be considered as a possible short cervical length. If the cervical length is congenitally short, it generally does not affect the function of the cervix and does not require special treatment. 2. The cervical shortening may be caused by the presence of cervical inflammation or atypical hyperplasia of the cervix, as well as after cervical conization surgery. In this case, it is necessary to assess whether there is cervical insufficiency, if there is cervical insufficiency it can cause preterm miscarriage and preterm labor, therefore it is not conducive to normal pregnancy and childbirth. In this case, the woman can be treated with cervical cerclage at around 14-20 weeks of gestation, with post-operative bed rest and fetal preservation medication, which may improve the survival rate of the fetus during pregnancy.