Anaemia Pregnancy Complete Guide
Anaemia in pregnancy — causes, symptoms, treatment, and iron-rich foods.
Anaemia means your blood has fewer healthy red blood cells or less haemoglobin than it needs, which reduces how efficiently oxygen is carried around your body. It's one of the most common blood-related issues in pregnancy, and while mild anaemia is usually easy to manage, it's worth understanding why it happens and how it's picked up.
Why anaemia is so common in pregnancy
Your blood volume increases substantially during pregnancy to support the growing baby and placenta. Because plasma (the liquid part of blood) increases faster than the number of red blood cells, your blood becomes naturally more dilute — this is sometimes called "physiological anaemia" and is a normal part of pregnancy. On top of this, your iron requirements go up significantly because iron is needed to make extra red blood cells and to supply the baby, so if your diet or iron stores don't keep pace, true iron-deficiency anaemia can develop. Other contributing factors include carrying twins or multiples, having closely spaced pregnancies, or entering pregnancy with low iron stores already.
Symptoms to watch for
- Persistent tiredness or fatigue that feels beyond normal pregnancy exhaustion
- Pale skin, lips, or inner eyelids
- Shortness of breath, even with mild activity
- Dizziness or lightheadedness
- Heart palpitations
- Headaches
- Restless legs
Many of these symptoms overlap with normal pregnancy tiredness, which is exactly why routine blood tests matter — anaemia can be present without obvious symptoms, especially in mild cases.
Testing and treatment
Your haemoglobin level is checked at your booking appointment and again around 28 weeks (sometimes more often if you're at higher risk or carrying multiples). If levels are low, your midwife or GP will usually recommend:
- Iron supplements, taken as prescribed — these are more effective than food alone at correcting an existing deficiency.
- Iron-rich foods, including red meat, dark leafy greens, beans and lentils, dried fruit, and fortified breakfast cereals.
- Vitamin C alongside iron, such as a glass of orange juice or some fruit, which helps your body absorb iron more effectively.
- Avoiding tea or coffee close to iron-rich meals or supplements, as tannins can reduce how much iron your body absorbs.
Most cases of pregnancy anaemia respond well to treatment within a few weeks, and your levels will be rechecked to confirm improvement.
Frequently Asked Questions
Is anaemia common in pregnancy?
Yes, it's one of the most common conditions in pregnancy because of the extra iron needed to support increased blood volume and the baby's development. Your midwife checks your haemoglobin at booking and around 28 weeks specifically to catch it early, so routine testing is a normal and expected part of antenatal care.
How can I increase my iron levels naturally?
Eating iron-rich foods such as red meat, leafy greens, pulses, and fortified cereals helps, especially when paired with a source of vitamin C to boost absorption. If a blood test shows you're anaemic, your midwife or GP will usually also recommend a prescribed iron supplement, since diet alone often isn't enough to correct an existing deficiency quickly.
Can anaemia harm my baby?
Mild anaemia that's identified and treated is very unlikely to cause problems. More severe, untreated anaemia can increase the risk of complications such as low birth weight or premature birth, which is why it's important to attend your antenatal blood tests and take any prescribed iron supplements as directed.
This article is for informational purposes only and does not constitute medical advice.
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