Menorrhagia is the term for excessive menstrual bleeding i.e. blood loss greater than 80ml during a menstrual period. Population studies show that the typical menstrual blood loss is 30-40ml, and that 90% of women have losses of less than 80ml.
Related conditions that may overlap with menorrhagia include:
Determining your blood loss
Studies that have measured blood loss have demonstrated that patients with menorrhagia have a considerable increase in menstrual blood flow during the first three days (up to 92% of their total menses being lost at this time). This suggests that the mechanisms responsible for cessation of menstruation are as effective in women who have menorrhagia as in normal women, despite the very high blood loss.
Although many women can tell if their blood loss is more or less than usual, it is difficult to accurately determine the actual blood loss using estimates based on the number of tampons or pads used. One study showed that 26% of women with normal menstrual loss considered their periods heavy, while 40% of those with heavy losses considered their periods to be moderate or light. [Acta Obstet Gynecol Scand 1966; 45: pp.320-51]
Possible causes include those associated with hormone changes such as too much estrogen or prolactin, too little or poorly timed luteinizing hormone, and polycystic ovarian disease. Physical causes include obesity or the presence of fibroids, endometrial hyperplasia, polyps, cancer, endometriosis, ectopic pregnancy, and IUD use. Bleeding disorders such as a deficiency of vitamin K or the use of blood thinners can be contributing factors. hypothyroidism, iron deficiency, and vitamin A deficiency.
When it has been determined that the cause is not organic (a physical condition), laboratory testing (bleeding time, complete blood count, and thyroid function) should be done, and any abnormalities corrected.
In a normal menstrual cycle, estrogen and progesterone regulate the buildup of the endometrium (uterine lining of blood and tissue), which is shed each month during menstruation. Menorrhagia can occur because of an imbalance between estrogen and progesterone. As a result of the imbalance, the endometrium keeps building up resulting in heavy bleeding when it is eventually shed. Since hormone imbalances are often present in adolescents and in women approaching menopause, this type of menorrhagia (dysfunctional uterine bleeding) is fairly common in these groups.
One study found serum retinol levels (a measure of vitamin A levels) to be significantly lower in women with menorrhagia than in healthy controls. 92% of those with lower levels experienced either complete relief or significant improvement after 25,000 IU of vitamin A was taken twice per day for 15 days.
Shepherd's purse has a long history of oral use in the management of obstetric and gynecologic hemorrhage. Uncontrolled studies have found intravenous and intramuscular injections to be effective in cases of menorrhagia that are due to functional abnormalities and fibroids. Its beneficial action in slowing blood flow is believed to be a result of its high concentration of oxalic and dicarboxylic acids. The use of botanicals should be reserved for difficult cases of menorrhagia, those cases where immediate cessation of blood loss is desired, and/or as a short-term aid to other therapies.
Comfrey has an astringent action which helps stop hemorrhages wherever they occur.
Consistently excessive blood loss will result in a negative iron balance which will result in lowered serum ferritin levels. Iron deficiency is a cause as well as consequence of menorrhagia. Body stores of iron are best reflected by serum ferritin. Ferritin levels will drop before changes in the blood count begin. Anemia may not yet be present when serum ferritin levels are getting low.
The following observations have been made regarding iron:
'Heme' iron (from meat) is 10 times more absorbable than most other forms of iron.
Capillary fragility is believed to play a role in many cases of menorrhagia. Supplementation with vitamin C and bioflavonoids has been shown to reduce menorrhagia. As vitamin C is known to significantly increase iron absorption, its therapeutic effect could also be due to enhanced iron absorption.
Based on its ability to help blood clot normally, vitamin K has been proposed as a treatment for excessive menstrual bleeding and is beneficial for some women. Although bleeding time and prothrombin levels in women with menorrhagia are typically normal, the use of vitamin K (often in the form of chlorophyll) does have limited research support. Green leafy vegetables and other sources of vitamin K should be eaten freely.
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