Anemia is a low level of healthy red blood cells (RBC). RBCs carry oxygen from the lungs to the rest of the body. When red blood cells are low the body does not get enough oxygen.
Liquid blood and plasma increases by about 50% during pregnancy but RBCs only increase by about 30%. This imbalance may lead to anemia.
The most common cause of anemia in pregnancy is a low level of iron. Iron is the mineral that makes hemoglobin. During pregnancy, your iron requirements increase If this need is not met or if your iron stores are low, you may develop anemia.
Other less common causes of anemia in pregnancy include:
Factors that may increase your chance of getting anemia in pregnancy include:
Anemia might not cause any symptoms. If symptoms do occur they may include the following:
Your practitioner will ask about your symptoms and medical history. A physical exam will be done. Your practitioner will test your blood for anemia at your first prenatal visit. It will also be tested again late in the second trimester or early in the third trimester.
Your practitioner will look at the following:
Other characteristics of your blood will be examined to look for any specific causes of your anemia.
The treatment for anemia in pregnancy depends on the cause of the anemia. Dietary changes usually are not enough. Treatment options include:
Your doctor may prescribe an iron supplement. Foods that are high in vitamin C, like oranges and other citrus fruits, will help your body absorb iron. Coffee, tea, milk, and calcium supplements can block absorption of iron. Avoid consuming these at the same time as your iron supplement.
Iron supplements may cause constipation and/or nausea. If your iron supplement causes constipation, then try increasing your fluid and fiber intake. If your iron supplement causes an upset stomach, your practitioner may advise that you take it with food or may prescribe a different formula.
If a folic acid or vitamin B12 deficiency is causing your anemia, your practitioner may prescribe a vitamin supplement.
To reduce your chances of anemia in pregnancy, take these steps:
American Pregnancy Association
US Department of Health and Human Services Women’s Health
The Society of Obstetricians and Gynaecologists of Canada
American Dietetic Association. Nutrition and Lifestyle for a Healthy Pregnancy Outcome. J Am Diet Assoc. 2002; 102:1470-1490.
Anemia & pregnancy. American Society of Hematology website. Available at: http://www.hematol.... Accessed June 5, 2013.
Anemia and pregnancy. University of California San Francisco Medical Center website. Available at: http://www.ucsfhealth.org/education/anemia_and_pregnancy. Accessed June 5, 2013.
Anemia in pregnancy. The American Congress of Obstetricians and Gynecologists, Practice Bulletin No. 95. Published July 2008. Reaffirmed 2012.
Hemoglobinopathies in Pregnancy. American College of Obstetricians and Gynecologists, Practice Bulletin, No. 78. Published January 2007. Reaffirmed 2008.
Last reviewed June 2013 by Andrea Chisholm; Brian Randall, MD
Last Updated: 6/5/2013
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