Menstruation 3 days did not have quantity to return little what reason

Women's menstrual cycle is generally three to seven days, menstrual three days clean is normal. If the menstrual volume is relatively small, less than 20 ml, can be called less menstruation. Less menstruation is mainly related to poor ovarian function, hormone deficiency in the body, estrogen deficiency in the case of endometrial growth can not be normal, exfoliation, can cause less menstruation. Polycystic ovary syndrome, hyperprolactinemia or endometrial damage, tuberculosis, can also cause less menstruation. To clarify the cause of less menstrual flow, it is best to go to a regular hospital for sex hormone six, B-ultrasound and other examinations, if necessary, hysteroscopy, endometrial biopsy, after clear reasons to take corresponding treatment measures.