What happened to the sudden decrease in menstrual flow in the last two months

Women observed that the last two months of menstrual volume will be less and less, so it may be abnormal. Women's normal menstrual volume is about 20-80mL, if the amount of menstruation than usual are much less, this may be done before abortion surgery, resulting in uterine adhesions and less menstrual volume. It may also be because of recent weight loss, long-term malnutrition, diet, resulting in less menstrual volume. If the recent mental stress is relatively large, often stay up late, causing endocrine disorders in the body, may also cause less and less menstrual volume. There are endometrial tuberculosis disease, polycystic ovary syndrome and other diseases, may also cause women's menstrual volume to become less and less. Some women are due to palace cold, intrauterine congestion, and cause less menstrual volume. These can go to the hospital to check the cause, under the guidance of a doctor for conditioning.