It is generally considered normal for menstruation to be delayed for up to a week. Women generally have their own fixed menstrual cycle, which is usually 21-35 days, with an average of 28 days. Some women experience menstrual irregularities when certain triggers occur, such as exertion, stress, pressure, or sudden changes in the environment, all of which can cause hormonal disruptions in the hypothalamic-pituitary-ovarian axis, leading to menstrual irregularities. An occasional menstrual irregularity that occurs 3-5 days early or within a week after the wrong period is considered normal. However, if you are a married woman and your period has stopped for more than one week, you must exclude pregnancy, and if you still do not have a period after ruling out pregnancy, you need to go to the hospital. If you still do not have a period, you need to see a doctor to regulate your menstruation, because if you wait too long, the endometrium will continue to thicken and you will have excessive menstrual bleeding when you have a period again.