In general, the thickness of the uterine wall in a normal woman is about 10 mm. If the patient is pregnant, the thickness of the uterine wall gradually increases and can reach about 20-25 mm. In the last stage of pregnancy, the uterine wall becomes progressively thinner, about 10-15 mm or even thinner. If the patient has fibroids or adenomyosis of the uterus, the thickness of the uterine wall is thicker. If the patient has had a cesarean section, especially with the formation of a uterine scar diverticulum, the thickness of the lower uterine segment is also thinner. If there is no requirement for childbirth, it is important to take good contraceptive measures.