Anaemia in Early Pregnancy: A Guide
Causes, symptoms and treatment of iron-deficiency anaemia in early pregnancy, with practical UK-focused advice on diet and supplements.
Table of Contents
Why Anaemia Is Common in Early Pregnancy
Anaemia means your blood does not have enough haemoglobin to carry oxygen efficiently. In pregnancy the most common cause is iron deficiency, because your body needs extra iron to grow the placenta and increase your blood volume by up to 50 percent. UK guidelines define anaemia as haemoglobin below 110 g/L in the first trimester. You may feel tired, breathless, dizzy, or notice pale skin and palpitations, but many people have no symptoms and the condition is picked up on the booking full blood count.
Treatment and Dietary Support
If your bloods show iron-deficiency anaemia, your midwife or GP will usually prescribe ferrous sulphate or another oral iron supplement. Taking it with vitamin C, such as a small glass of orange juice, improves absorption, while tea, coffee, calcium supplements and dairy foods reduce it. Iron tablets can cause constipation and dark stools, which is normal. A diet rich in lean red meat, poultry, fish, lentils, chickpeas, fortified breakfast cereals, tofu and dark green vegetables supports your levels. If oral iron is not tolerated or not working, you may be offered intravenous iron.
Frequently Asked Questions
Can anaemia harm my baby?
Mild anaemia is common and rarely affects the baby directly. Severe or untreated anaemia is linked to a higher risk of preterm birth and low birth weight, which is why your midwife monitors haemoglobin throughout pregnancy.
Should I take an iron supplement before I get anaemic?
Routine iron supplementation is not recommended for all pregnant people in the UK. Your midwife will prescribe iron only if your bloods show a deficiency, because excess iron can cause side effects.
How long does it take for iron tablets to work?
Haemoglobin usually rises within two to three weeks of starting iron tablets, and most people see a normal result within two to three months. Your midwife will repeat the blood test to confirm.
This information is for educational purposes only and is not a substitute for professional medical advice. Always consult your midwife, GP, or obstetrician about your individual results and care plan.
Further reading:
Related articles: Early Pregnancy Blood Tests | hCG Levels Explained | Anaemia in Pregnancy