low ferritin

Bleeding Disorders Overlooked in Women With Heavy Periods

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Four years ago, when the heavy period bleeding which I’d had since adolescence suddenly became much worse, I never would have predicted that the cause of the bleeding would not be correctly diagnosed and treated until after I’d had an unnecessary surgery, a preventable major complication of another surgery, months of severe anemia and more. And yet many women may be at risk for similar problems without realizing it.

Heavy period bleeding (medically called menorrhagia) is a very common problem in women of reproductive age, affecting up to 30 percent of women. This type of bleeding can be very debilitating and difficult to deal with, as well as posing a diagnostic challenge for doctors to identify the underlying cause.

There are many possible causes of menorrhagia, including hormonal imbalances and dysfunction of the ovaries, fibroids, uterine polyps, adenomyosis, intrauterine devices (IUDs), and in rare cases, cancers of the reproductive system. One cause that is not often considered is a bleeding disorder. Up to 20 percent of women with menorrhagia may have von Willebrand’s disease, which is the most common of the so-called “mild” bleeding disorders (which include any bleeding disorder not classified as a severe hemophilia). The number of women with menorrhagia who have an undiagnosed bleeding disorder is even higher when platelet function disorders, another type of “mild” bleeding disorder, are included.

Studies have shown that gynecologists are not likely to consider a bleeding disorder as a possible cause when investigating menorrhagia, and are not likely to refer women with heavy period bleeding to a hematologist for further investigation, even when gynecological causes are ruled out. One study found that only four percent of physicians surveyed would consider von Willebrand’s disease as a possible diagnosis in women with menorrhagia, and only 3 percent of physicians would refer patients to a specialist.

Studies have also shown that women with undiagnosed bleeding disorders are more likely to be subjected to unnecessary surgical procedures, including hysterectomy, as a “fix” for the bleeding that doesn’t address the underlying problem. Menorrhagia is the major reason for approximately 300,000 hysterectomies per year in the U.S. Given the prevalence of undiagnosed bleeding disorders in this population, 60,000 or more hysterectomies per year could be performed in women whose menorrhagia could be addressed with treatment for their bleeding disorder instead of a major surgery. Women with von Willebrand’s disease are more likely to undergo a hysterectomy (26 percent of women with von Willebrand’s disease, compared to 9 percent of women in the control group) and to have the hysterectomy at a younger age.

In addition, undiagnosed bleeding disorders have a serious effect on women’s quality of life, and put women at risk for medical complications. Although women who have not experienced it, or men, who of course cannot experience it, may dismiss heavy period bleeding as simply a nuisance, it is far more than that. It can cause serious problems such as anemia, complications from childbirth and surgical procedures, lost work or school time, lifestyle issues, psychological disruptions, and have major effects on quality of life. The health-related quality of life for women with menorrhagia and a bleeding disorder was studied and found to be similar to that of HIV-positive men with severe hemophilia, underscoring the difficult symptoms and lifestyle issues that can result from these problems.

My own medical history reads like a clinical case study designed to educate doctors about the possible pitfalls of undiagnosed bleeding disorders, and judging by the numbers, there are many more women out there going through the same thing. After my son was born, the menorrhagia I’d had since I was a teenager worsened significantly. I had gynecological causes ruled out—no polyps, fibroids, or cancer. I already had been diagnosed with endometriosis, but that was not thought to be the cause of the bleeding. My gynecologist deemed the cause to be “hormonal” and spent two years trying to fix it with birth control pills, which didn’t work. At some point during those two years I asked for a referral to a hematologist, which I was told I didn’t need after a few preliminary blood clotting tests came back normal. I had an endometrial ablation, which also didn’t work, and caused my pelvic pain to worsen so severely that my first period after the ablation landed me in the ER (increased pelvic pain is a known risk with endometrial ablation).

I had enough of a history the first time I asked to warrant a referral. My history at that time included bleeding complications with my first laparoscopy for endometriosis, history of heavy periods with gynecological causes ruled out, easy bruising and bleeding gums. However, it took four more years of suffering with the symptoms of anemia, low ferritin, and heavy periods, one unnecessary surgical procedure (the ablation), and a preventable surgical complication that required a subsequent surgery (I had a major internal hemorrhage after excision surgery for endometriosis and removal of my left ovary and tube) and three more requests for hematology referrals, before I was finally referred to a hematologist and ultimately diagnosed with a bleeding disorder. And some studies show that the diagnostic delay from onset of bleeding symptoms can be up to 16 years! It is time for this to change. Gynecologists need to consider the possibility of bleeding disorders, and work with hematologists when appropriate, when trying to diagnose the underlying causes of menorrhagia.

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An Often Overlooked Cause of Fatigue: Low Ferritin

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Fatigue is a very common complaint, reported to general practice doctors up to 25 percent of office visits. The incidence of fatigue is even higher than this, however, since many people experiencing fatigue do not report it to their doctors. Many people are tired because of busy lives, work and home obligations, and not getting enough rest. Fatigue is also a component of many illnesses and chronic diseases. Often fatigue is dismissed by doctors either as being a normal part of life, or as being a result of emotional disturbances or stress. Women are three times more likely to have fatigue than men.

Iron Deficiency Anemia

One common cause of fatigue in reproductive age, menstruating women is iron deficiency anemia. A lesser known cause but possibly equally prevalent is low ferritin, caused by low iron stores. Iron deficiency anemia occurs when there is not enough iron in the body, and the production of red blood cells is affected. It can affect up to 20 percent of women. Causes of iron deficiency anemia in menstruating women include heavy periods, gynecological diseases such as fibroids or adenomyosis, gastrointestinal bleeding, and gastrointestinal malabsorption.

Iron deficiency anemia is often assessed by taking blood and measuring the hemoglobin level: hemoglobin is a protein in red blood cells that binds to iron, and transports oxygen in the blood. Hemoglobin is measured as part of a complete blood count (CBC). Normal hemoglobin range in the blood is usually 12 to 15 g/dL, but the normal range can vary slightly depending on the lab. In iron deficiency anemia hemoglobin values are lower than 12 g/dL.

Symptoms of iron deficiency anemia include:

  • Fatigue
  • Shortness of breath
  • Dizziness
  • Headaches
  • Cold hands and feet
  • Pale skin
  • Chest pain
  • Weakness
  • Restless legs syndrome

Iron deficiency anemia is usually easily recognized and treated. The CBC is a very commonly performed blood test, and low hemoglobin, plus other results contained within the CBC panel, is a good indicator of iron deficiency anemia. It is treated with oral iron, which can be obtained in drug stores without a prescription. Side effects of oral iron include nausea, vomiting, constipation, diarrhea, dark colored stools, and abdominal pain. Iron supplements should not be taken without having a doctor monitor the blood levels of iron, since too much iron can cause buildup of excess iron and organ damage.

Low Ferritin and Fatigue

Although the importance of treating iron deficiency anemia is well recognized, many health practitioners do not test the body’s iron stores, and low iron stores, indicated by low ferritin levels, can also cause fatigue. Ferritin is a protein that stores iron in the body. It is not measured by the CBC, but can be measured by a separate blood test. Usually the only consequence of low ferritin is thought to be that it might put a person at risk for developing iron deficiency anemia. However, low ferritin on its own, even without anemia, can cause fatigue.

Several studies have shown that in people with fatigue, with normal hemoglobin levels, oral iron supplementation can improve fatigue. This was particularly true when ferritin levels were below 50 µg/L. Intravenous iron supplementation is another option for treatment and may be particularly appropriate if the ferritin levels are below 15 µg/L. Most labs use 12 -150 µg/L as the normal range for women for ferritin, although this may vary from lab to lab. Therefore, many women who could benefit from iron supplementation for fatigue may be classified as having “normal” ferritin levels.

The normal reference ranges are obtained by sampling ferritin concentrations in populations of women, many of whom may have had iron deficiency, and whether the lower limit of the normal range is actually too low has been brought into question. The fact that iron supplementation improves fatigue when ferritin levels are below 50 µg/L would suggest that this is the case. Therefore, all women should be aware that low iron levels can contribute to fatigue even if anemia is not present, that checking ferritin is an important part of an investigation into unexplained fatigue, and that even if their ferritin levels are deemed to be “normal”, that if the levels are below 50 µg/L, iron supplementation may improve their fatigue.

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More people than ever are reading Hormones Matter, a testament to the need for independent voices in health and medicine. We are not funded and accept limited advertising. Unlike many health sites, we don’t force you to purchase a subscription. We believe health information should be open to all. If you read Hormones Matter, like it, please help support it. Contribute now.

Yes, I would like to support Hormones Matter. 

This post was first published on April 2, 2014.