Anaemia of pregnancy occurs when expectant mothers do not have enough healthy red blood cells to carry oxygen to their body and growing baby. While mild anaemia is common due to increased blood volume during pregnancy, more severe forms need proper attention and treatment to protect both mother and child.

Managing Blood Health During Pregnancy

When a woman becomes pregnant, her body undergoes remarkable changes to support the growing baby. One of the most significant changes is an increase in blood volume by about 20% to 30%, which places higher demands on the body’s ability to produce red blood cells. These cells contain hemoglobin, a protein that carries oxygen from the lungs to tissues throughout the body and to the developing baby. To make sufficient hemoglobin and red blood cells, the body needs a steady supply of iron, vitamins, and other nutrients.^[1][2]

The goal of managing anaemia during pregnancy is to ensure that both mother and baby receive adequate oxygen for healthy development. Treatment focuses on correcting nutritional deficiencies, preventing complications, and supporting the overall health of the pregnancy. Medical professionals emphasize early detection and intervention, as untreated anaemia can affect fetal growth and increase risks during delivery. Each woman’s treatment plan depends on the severity of anaemia, the stage of pregnancy, and individual circumstances.^[7]

Healthcare guidelines recognize that mild anaemia is a normal part of pregnancy due to blood volume expansion. However, when red blood cell production cannot keep pace with this expansion, or when the mother lacks sufficient iron stores, more significant anaemia develops. This condition is preventable and treatable, and modern medical practice includes routine screening to identify women who need additional support.^[8]

Standard Treatment for Anaemia of Pregnancy

The foundation of treating anaemia during pregnancy begins with proper nutrition and supplementation. Medical professionals typically recommend that pregnant women consume at least 27 milligrams of iron daily, compared to 18 milligrams for non-pregnant women. This increased requirement reflects the body’s need to build more red blood cells for both the mother and the developing baby.^[2][15]

Oral iron supplements serve as the first-line treatment for iron deficiency anaemia in pregnancy. These supplements are usually prescribed in addition to prenatal vitamins, which already contain some iron. The most commonly used form is ferrous sulfate, though other iron preparations may be offered if a woman experiences side effects. Taking iron supplements on an empty stomach helps with absorption, but if stomach upset occurs, taking them with a small amount of food is acceptable. However, women should avoid taking iron with dairy products or calcium supplements, as these can interfere with iron absorption.^[1][13]

For folate deficiency anaemia, treatment involves supplementation with folic acid, the synthetic form of folate. This B vitamin is crucial not only for red blood cell production but also for preventing birth defects of the brain and spinal cord. Most prenatal vitamins contain adequate folic acid, but women with diagnosed folate deficiency may need additional supplementation. Folate is found naturally in dark green leafy vegetables, beans, and fortified cereals.^[4][16]

Vitamin B12 deficiency anaemia requires a different approach, particularly for women who follow vegetarian or vegan diets. Vitamin B12 is found primarily in animal products such as meat, poultry, eggs, and dairy. Women who do not consume these foods may require B12 supplements or, in some cases, B12 injections during pregnancy to ensure adequate levels for both mother and baby.^[3][22]

Dietary modifications complement supplement therapy. Healthcare providers encourage pregnant women to eat iron-rich foods including red meat, chicken, fish, eggs, dried beans, dark leafy greens, and fortified cereals. The iron in meat products, known as heme iron, is more easily absorbed by the body than the iron in plant-based foods. Consuming vitamin C-rich foods such as citrus fruits and fresh vegetables alongside iron-rich meals enhances iron absorption. Some practitioners even recommend cooking with cast iron pots, which can add significant amounts of iron to food.^[20][24]

The duration of oral iron therapy typically extends throughout pregnancy and may continue into the postpartum period, especially if anaemia was severe or blood loss occurred during delivery. Healthcare providers monitor hemoglobin levels through regular blood tests to assess treatment effectiveness. Most women respond well to oral iron supplementation, with gradual improvement in their red blood cell counts over weeks to months.^[13]

For women who cannot tolerate oral iron, do not respond to it, or have very severe anaemia, intravenous iron therapy represents an alternative treatment option. This approach delivers iron directly into the bloodstream, bypassing the digestive system entirely. Several intravenous iron preparations are available and considered safe for use during pregnancy, particularly in the second and third trimesters. These include ferric carboxymaltose and ferric derisomaltose, which can be given as single-dose infusions in hospital or clinic settings.^[12][17]

Treatment in Clinical Trials

Research into anaemia of pregnancy continues to evolve, with clinical trials exploring new approaches to diagnosis and treatment. One significant area of investigation focuses on optimizing the timing and delivery method of iron supplementation to maximize effectiveness while minimizing side effects.

Recent large-scale clinical trials have examined the use of intravenous iron administered early in pregnancy, specifically during the second trimester. A major study conducted across multiple sites in India enrolled 4,368 pregnant women with moderate anaemia and iron deficiency before 17 weeks of pregnancy. This trial, one of the largest of its kind, compared standard oral iron supplementation with single-dose intravenous iron preparations. The two intravenous formulations tested were ferric carboxymaltose and ferric derisomaltose, both approved for use in India.^[12]

The trial operated in Phase III, meaning researchers compared the new treatment approach directly with standard care to evaluate its effectiveness and safety on a large scale. Early intervention with intravenous iron showed promising results. Women who received intravenous iron during the second trimester required significantly less additional iron supplementation or blood transfusion before delivery compared to those taking oral iron. The ferric carboxymaltose group also demonstrated a reduced incidence of low birth weight babies. All three treatment approaches achieved similar rates of correcting anaemia by the time of delivery, but the intravenous routes appeared to offer advantages in terms of reducing the need for additional interventions.^[12]

The mechanism behind intravenous iron therapy involves delivering iron directly into the bloodstream in a form that the body can immediately use to build red blood cells. Unlike oral iron, which must be absorbed through the intestinal tract and can be affected by dietary factors or digestive issues, intravenous iron bypasses these potential barriers. This makes it particularly valuable for women with severe anaemia who need rapid iron repletion, those who cannot absorb oral iron adequately, or those who experience intolerable side effects from oral supplements.^[13]

Research conducted in various countries, including India, the United States, and throughout Europe, continues to refine guidelines for when and how to use intravenous iron in pregnancy. The safety profile of newer intravenous iron formulations has been favorable in clinical trials, with serious adverse reactions being rare. Common minor reactions may include injection site discomfort or temporary changes in blood pressure, but these are generally manageable in clinical settings.^[17]

Another area of active research involves improving diagnostic methods for anaemia in pregnancy. Clinical trials are examining whether measuring serum ferritin, a protein that indicates iron stores in the body, provides more accurate assessment of iron deficiency than hemoglobin levels alone. Ferritin testing has high sensitivity and specificity for diagnosing iron deficiency anaemia unless inflammation is present. Better diagnostic tools could help identify women who would benefit most from early, aggressive treatment.^[17]

Studies examining the timing of iron supplementation suggest that beginning treatment early in pregnancy, even before severe anaemia develops, may prevent complications more effectively than waiting until later trimesters. This aligns with the principle that iron requirements increase dramatically during the second and third trimesters when fetal growth accelerates. Early intervention allows the body time to rebuild iron stores gradually.^[12]

Researchers continue to investigate the optimal formulations and dosing schedules for both oral and intravenous iron. Some trials explore whether intermittent dosing of oral iron might reduce side effects while maintaining effectiveness, or whether combining different forms of iron supplementation could improve outcomes. The goal is to develop treatment strategies that maximize compliance, minimize adverse effects, and achieve the best possible outcomes for mothers and babies.^[13]

Most common treatment methods

• Oral iron supplementation
  • Ferrous sulfate and other oral iron preparations taken daily, usually in addition to prenatal vitamins
  • Requires consistent intake throughout pregnancy and sometimes into the postpartum period
  • Enhanced by consuming vitamin C-rich foods and avoiding calcium at the same time
  • May cause side effects including constipation, nausea, dark stools, and stomach upset
• Folic acid supplementation
  • Synthetic form of folate, a B vitamin essential for red blood cell production
  • Typically included in prenatal vitamins but may require additional supplementation
  • Important for preventing neural tube defects in the developing baby
  • Found naturally in dark leafy greens, beans, and fortified cereals
• Vitamin B12 supplementation
  • Essential for women following vegetarian or vegan diets
  • May be given as oral supplements or injections during pregnancy
  • Found naturally in animal products including meat, eggs, and dairy
• Intravenous iron therapy
  • Direct delivery of iron into the bloodstream, bypassing the digestive system
  • Uses preparations such as ferric carboxymaltose and ferric derisomaltose
  • Can be administered as single-dose infusions in clinical settings
  • Reserved for women who cannot tolerate oral iron, do not respond to it, or have severe anaemia
  • Considered safe for use particularly in the second and third trimesters
• Dietary modifications
  • Increased consumption of iron-rich foods including red meat, poultry, fish, eggs, beans, and dark leafy vegetables
  • Heme iron from meat is more easily absorbed than iron from plant sources
  • Pairing iron-rich foods with vitamin C sources to enhance absorption
  • Cooking with cast iron pots to add iron to foods
  • Avoiding dairy products and calcium supplements when consuming iron-rich meals