The absence of menstruation after induced abortion may be due to pregnancy, or it may be due to other reasons. If the patient has sex after induced abortion without good contraception, this situation should first rule out the possibility of pregnancy. If the cervical canal of the uterus is damaged during the operation of induced abortion, menstruation will not occur after induced abortion, and the patient will have clinical manifestations such as distension and pain in the belly, lumbar pain, and anal distension at this time. If the endometrium is damaged during the operation, it will also lead to no menstruation after induced abortion. Therefore, if you find this situation, first of all, you should check the urine by yourself to see if you are pregnant. If it is not pregnancy, you can go to the hospital for ultrasound to see what is the cause.