Normally, the incision for a C-section is about 12 centimeters long. Normally, a woman’s head can be about 9-10 centimeters in diameter at the time of delivery, so if a cesarean section is needed to end the labor, an incision of about 12 centimeters on the woman’s abdominal wall is appropriate. However, the exact length of the incision varies from person to person, as the condition of each woman at the time of delivery is different, and the biparietal diameter of the fetus varies. Pregnant women should have regular prenatal checkups during pregnancy and should seek medical attention if they feel unwell. During labor and delivery, the mother should try her best to cooperate with the doctor and inform the medical staff as soon as possible if there is any incision pain, redness, swelling or fever after delivery.