More than 30 days without menstruation, if the time exceeded is within a week is normal, more than a week is an abnormal situation. 1. Normal situation. Women’s menstrual cycle is usually about 21~35 days, due to environmental changes, labor, stress or taking drugs, dieting, weight loss and other factors caused by menstruation advance or delay 3~7 days are within the normal range. Normally regular menstruation more than 30 days do not come first to check whether the pregnancy, if not pregnant, more than a week is normal, can be temporarily observed, to avoid fatigue and tension, pay attention to regular life. 2. If the examination excludes pregnancy, and the delay of menstruation has been more than a week is abnormal, may be related to endocrine disorders or organic lesions, such as polycystic ovary syndrome, premature ovarian failure, endometrial damage, ovarian cysts and other diseases, will affect the normal time of menstruation. It is necessary to improve the ultrasound and sex hormone six and other tests, in order to regulate the cause of menstruation, and exclude organic lesions can take progesterone, ethinyl estradiol cyproterone tablets and other drugs to regulate menstruation.