Menstrual Disorders
Common causes of heavy or prolonged menstrual bleeding include: Adolescence (during which cycles may not be associated with ovulation) Polycystic ovary syndrome (PCOS) (bleeding irregular but heavy) Uterine fibroids (benign growths of uterine muscle).Menstrual bloodis mainly composed of blood, old parts of uterine tissue, cells from the mucus lining of the vagina and bacteria making up the vaginal flora. Menstrual blood is different from normal blood due to its composition and its physical properties.