If menstruation is delayed and stomach pain occurs, married women or women with a history of sexual intercourse, it is recommended to rule out the possibility of pregnancy, if the morning urine for early pregnancy test is a positive result, clinically to rule out the possibility of ectopic pregnancy, timely ultrasound to determine the location of the gestational sac, if it is an ectopic pregnancy must be given treatment in a timely manner in order to avoid delays in the condition. If the laboratory examination is not pregnant, clinically there may be pelvic inflammatory disease or endometriosis, after the delay of menstruation of the lower abdomen pain, this situation is recommended according to the results of ultrasound examination to understand the thickness of the uterine lining. If the thickness of the endometrium is already above 1cm, menstruation may come soon in the near future, and you can drink brown sugar water to induce menstruation. If the endometrial lining thickness is around 8mm or 9mm, and the time for menstruation is still far away, it is recommended to take oral progesterone to induce menstruation.