Abstract: Uterine rupture is a sever complication in obstetrics. Thought its prevalence is low, the influences of maternal and perinatal outcome are greater. Many factors can result in uterine rupture, of which scarred uterus following casarean section and other uterus surgery is the most common risk factor. With the two-child policy, the potential risk of uterine rupture increased after pregnancy in women with scarred uterus. In addition to scarred uterus, the other factors including abnormal structures of uterus, dystocia, age, gravidity, parity，and medicine. It cannot be ignored because it′s affected by the gravida′s condition, family support and social context. Uterine rupture during pregnancy should be put more attention than delivery due to the devastating complications. We summarized the risk factors of uterine rupture during the pregnancy and provided the suggestion of screening and assessment of uterine rupture, which aims to prevent the uterine rupture during pregnancy. It also provided the basis for the detection, diagnosis and treatment of uterine rupture in early stage to avoid serious maternal and prenatal complications.

Key words: Uterine rupture, Pregnancy, Risk factors, Casarean section, Cicatrix