If you usually have a normal sexual life, do not use contraceptives, and your period does not come for more than 7 days beyond the normal menstrual cycle, pregnancy is more likely. If you do not have a period beyond the normal menstrual cycle, it is recommended to use an early pregnancy test to rule out the possibility of early pregnancy. If the delayed menstruation is caused by early pregnancy, the early pregnancy test will be positive or weakly positive. If early pregnancy is ruled out and menstruation is delayed, it may be caused by irregular life, prolonged sleeplessness, stress and other factors. It is suggested that observation is the main reason, and if it is more than 14 days after normal menstruation, progesterone can be injected orally or intramuscularly to promote menstruation. Occasional delayed menstruation does not affect normal conception, but if it occurs frequently, it may be caused by insufficient secretion of estrogen or premature ovarian failure, so it is recommended to identify the cause and treat it.