Incision pregnancy will bleed in the early stage is caused by the weak muscle layer at the incision and the chorionic villus invasion after the fertilized egg has been deposited. Incisional pregnancy, that is, cesarean section scar pregnancy, refers to the fertilized egg in the previous cesarean section uterine incision scar bed, also belongs to a kind of ectopic pregnancy. As the muscle layer of the scar is relatively weak, the fertilized egg can cause irregular vaginal bleeding at an early stage, which needs to be clearly diagnosed under ultrasound examination. Patients with cesarean scar pregnancies are at higher risk of serious complications such as placenta implantation, placenta praevia, and uterine rupture, and termination of the pregnancy is often recommended once the diagnosis has been made, either by medication (methotrexate) or surgical procedures (e.g., ultrasound-guided gestational debridement, etc.). Pregnant women with a strong desire to continue the pregnancy must be closely monitored and promptly seen for termination in the event of abnormalities.