A scarred uterus is generally defined as a uterus that has been delivered by cesarean section. Most women with a history of cesarean section have a scarred uterus, because the fetus is removed by cesarean section, and the doctor removes the fetus after cutting the plasma membrane layer and the myometrium layer of the uterus, and then sutures the uterus layers, so the complete and smooth uterine surface before is the sutured surface after the incision, and the scar gradually grows up over time, but such a uterus is called a scarred uterus. In addition, some women have had fibroids in the past, such as subplasmalignant fibroids, and then underwent myomectomy to remove the fibroids and suture the stump, so such a woman’s uterus is also called a scarred uterus. Scarred uterus is usually associated with the risk of uterine rupture in a second pregnancy, the risk of hemorrhage due to embryonic implantation in the scar or placenta implantation, or the risk of poor postoperative healing if the second pregnancy is followed by a second cesarean section. In conclusion, the uterus of a woman who has had a previous cesarean section or myomectomy is called a scarred uterus. If a woman with a scarred uterus is pregnant, she must have a close maternity check to prevent complications such as uterine rupture or placental implantation. Therefore, if women planning to have a second child choose cautiously to have a cesarean section, it is advisable to have a vaginal delivery as much as possible.