No menstrual bleeding what happened?

When there is no menstrual bleeding, that is abnormal uterine bleeding, abnormal uterine bleeding is very many reasons, the most common is endocrine disorders, as well as uterine fibroids, endometrial polyps, cervical lesions, cervical polyps, ovarian tumors and endometrial lesions. There are endometrial cancer and ovarian cancer, there are cervical cancer, these reasons will show vaginal bleeding when there is no menstruation, so show this phenomenon must be timely to the hospital to do an examination.