When the scarred uterus is pregnant again, symptoms such as uterine rupture, postpartum hemorrhage, and placenta praevia may occur. Among these, uterine rupture is the earliest and most common clinical manifestation, and pressure pain can occur in the scarred area, especially during the intervals of uterine contractions. Uterine rupture causes abnormal vaginal bleeding, intra-abdominal hemorrhage, hypovolemic shock, elevated fetal head position or rather retraction of the fetal head from the vagina. When uterine rupture is suspected or diagnosed an emergency plan should be quickly activated to perform an emergency cesarean section to terminate the pregnancy. When pregnant women with scarred uterus undergo delivery, care must be taken to prevent the increase of surgical complications such as injury, infection, aggravation of adhesions, and poor incision healing.