Consider that it is caused by delayed menstruation, such as living habits, emotional factors, pregnancy, cold stimulation during menstruation, malnutrition, side effects of drugs, endocrine dysfunction, gynecological diseases and so on. If you have sex you should take a pregnancy test in time to observe whether there is a possibility of pregnancy. First of all, you should adjust your mind, maintain good habits, live a regular life, and eat more food containing nourishing or iron-rich food, so as to avoid iron-deficiency anemia. Secondly, you can use traditional Chinese medicine to regulate, using blood nourishing menstruation, nourishing the liver and kidneys of traditional Chinese medicine prescriptions, such as the Jiu Yuan Decoction combined with Gui Kidney Pills plus subtraction, or the addition of the reduction or warm menstruation soup plus subtraction, etc., and at the same time pay attention to the cold and warmth, cold during the period will easily lead to pelvic blood vessel contraction, resulting in ovarian dysfunction.