How does menstruation come less to return a responsibility

If menstruation is relatively small, consider that there may be qi and blood deficiency or endocrine disorders caused by slow endometrial hyperplasia or thin endometrium and other reasons. If menstruation has been normal, occasionally a small amount of time to rule out the possibility of pregnancy, it is recommended to use early pregnancy test paper or go to the hospital to draw blood for hormone level determination. If the value of human chorionic gonadotropin 10IU/mL, you can determine pregnancy. Menstruation stops after pregnancy or occasionally shows a small amount of bleeding.