Delayed menstruation for more than ten days may be due to a variety of reasons, such as pregnancy, menstrual irregularities, etc., and should be identified. For women who usually have regular menstrual cycles, i.e., 28-30 days to a menstrual period, have a normal sexual life during the period, and do not take proper contraceptive measures, a delay of ten days without menstruation can be the result of an unwanted pregnancy. It is recommended that women use pregnancy tests, pregnancy sticks, or go to the hospital for blood tests to determine if they are pregnant. If pregnancy is ruled out, delayed menstruation for more than ten days may also be caused by endocrine disorders, abnormal function of the gonadal axis, resulting in abnormal thickening of the uterine lining and delayed menstruation, which needs to be examined in the hospital for the cause of delayed menstruation and treatment. In addition, the combination of metabolic diseases such as hyperthyroidism, hypothyroidism, polycystic ovary syndrome or hyperprolactinemia may also affect ovulation, which leads to delayed menstruation and prolonged cycle, patients need to identify.