A woman with a regular menstrual cycle who has delayed her period for 8 days without contraception may be pregnant. It is recommended to carry out blood HCG examination or ultrasound examination to know whether the uterus early pregnancy, if the diagnosis is pregnant, the delay in menstruation is caused by pregnancy. If you rule out pregnancy, ultrasound suggests that the uterine lining is thickened, you can give progesterone capsules orally to encourage menstruation. There are many reasons for delayed menstruation, such as work and study stress, environmental changes, emotional changes, and the effects of medication can cause delayed menstruation. If it is occasionally caused by delayed menstruation, you can also temporarily observe. Normally, you should develop good living habits, do not stay up late, do not drink, do not eat cold and spicy food, pay attention to keep warm to avoid getting cold. Most of the menstruation can be normalized after adjustment. If menstruation is often delayed, hormone levels should be examined, and treatment should be given according to the results of the examination.