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Iron in Pregnancy: The Complete Guide

Iron is one of the nutrients that demand extra attention in pregnancy. Your blood volume increases by nearly 50%, and your body needs iron to make haemoglobin, the protein that carries oxygen to your baby. In this guide we cover why iron matters, how to get enough, and what to do if your levels drop.

Table of Contents

  1. Why Iron Matters in Pregnancy
  2. How Much Iron Do You Need?
  3. Iron-Rich Foods
  4. Iron Deficiency and Supplements
  5. FAQ

Why Iron Matters in Pregnancy

During pregnancy your body makes significantly more blood to supply oxygen and nutrients to your baby and to prepare for blood loss at birth. Iron is the core component of haemoglobin, and without enough of it you can develop iron-deficiency anaemia. Anaemia in pregnancy is linked to tiredness, breathlessness, a higher risk of infections, and in severe cases an increased chance of premature birth or low birth weight. Your midwife will check your haemoglobin levels at your booking appointment and again around 28 weeks.

How Much Iron Do You Need?

The recommended daily intake of iron in pregnancy is around 27mg, compared with 14.8mg for non-pregnant women. Most pregnancy multivitamins include some iron, but not always the full amount — check the label. Your diet will provide the rest. Women carrying twins, those with heavy periods before pregnancy, vegetarians and vegans, and those with a history of anaemia may need extra support.

Iron-Rich Foods

There are two types of iron in food. Haem iron, found in red meat, poultry, and fish, is well absorbed by your body. Non-haem iron, found in lentils, beans, tofu, spinach, fortified cereals, dried apricots, and seeds, is less easily absorbed but still valuable. To boost absorption, pair iron-rich foods with a source of vitamin C such as orange juice, peppers, or tomatoes. Avoid drinking tea or coffee with meals, as they contain compounds that reduce iron uptake.

Iron Deficiency and Supplements

If your routine blood tests show low haemoglobin or low ferritin (your iron stores), your midwife or GP may prescribe an iron supplement, often a tablet taken once or twice a day. Common forms include ferrous sulphate and ferrous fumarate. Side effects can include constipation, nausea, and dark stools. Taking iron with food can reduce nausea, and a high-fibre diet helps with constipation. Never self-prescribe high-dose iron, as excess iron can be harmful.

FAQ

### Should I take an iron supplement in pregnancy even if my levels are normal?

If your blood tests are normal and you eat iron-rich foods, a separate iron supplement is not usually needed. Most pregnancy multivitamins contain a modest amount that is enough for women with good stores.

What are the signs of iron deficiency in pregnancy?

Common signs include unusual tiredness, breathlessness on exertion, dizziness, pale skin, and headaches. If you notice any of these, ask your midwife for a blood test rather than self-supplementing.

This article is for informational purposes only and does not constitute medical advice.

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