Menstruation came half month how be to return a responsibility

The concept of normal menstruation is every 21 to 35 days, each menstrual bleeding time 3 to 7 days, more than 7 days belong to abnormal uterine bleeding, need to go to the hospital as soon as possible, do relevant examinations, including B-ultrasound, blood tests, etc., let the doctor to help you judge, why the abnormal uterine bleeding, find the cause and then targeted treatment. The most common cause of abnormal uterine bleeding in general is directly related to ovulation, because menstruation is directly related to ovulation, ovulation is normal, menstruation is normal, ovulation shows problems, menstruation will also show abnormalities.