If there is no menstruation for two months and there is no pregnancy through laboratory tests, it is common in clinical practice for the following reasons: first, it is caused by endocrine disorders. For example, a sudden change in the environment, or a clinical change in mood, or a major emotional shock, may cause endocrine disruption and lead to non-menstruation. It is recommended that you can take progesterone orally to promote menstruation, once a day, two capsules at a time, for 3 days, after 3-7 days after stopping the drug will come to menstruation. The second one is caused by the decline of ovarian function. When the ovarian function declines, the endometrium becomes thinner clinically, and this can lead to the absence of menstruation. The initial diagnosis can be made clinically by checking the sex hormone panel. Thirdly, endometrial tuberculosis and pelvic tuberculosis can also cause amenorrhea. The diagnosis can be made by combining the clinical history with the appropriate laboratory tests.