Excess bleeding at menses, in duration or amount. Causes are many, although chronic menorrhagia and PMS is usually the result of deficient progesterone secretions (days-per-month) or constant adipose-released estradiol from obesity or recent substantial weight loss. Uterine fibroids can contribute, as can menopausal breakthrough bleeding or flooding, coagulation disorders, and most serious metabolic disease can produce menorrhagia as one of many symptoms. My rule of thumb as an herbalist is, if botanicals fail to control the bleeding directly (hemostatics) or attempting to reestablish a good folliculization for the next month's corpus luteum does not help, there may be a metabolic problem or an overt reproductive pathology. In menopausal menorrhagia, however, the conditions are transitional and in flux...it is hard to use such absolute statements.