What should you know about iron and calcium in pregnancy?

Iron helps make haemoglobin, the protein that carries oxygen in red blood cells. Calcium supports bones, teeth, muscles, and nerve signalling. Calcium in the gut can interfere with absorption of some oral iron products, so a midwife or doctor may recommend spacing the supplements. The right plan depends on your blood results, diet, pregnancy stage, and prescribed product.

Low iron can contribute to anaemia, tiredness, weakness, pale skin, or restless legs, but these symptoms have other possible causes. A blood test is more useful than symptoms alone for deciding whether iron is needed.

Follow the label and your maternity team’s instructions rather than adding extra supplements. Ask how far apart to take iron and calcium, whether food is recommended, and how to manage nausea or constipation. Keep supplements away from children. Mention every vitamin, antacid, and medicine because products can overlap or affect absorption.

Contact your maternity team promptly if you cannot keep supplements down, develop marked weakness, breathlessness at rest, fainting, chest discomfort, or bleeding. Seek urgent help for severe breathing difficulty, collapse, or sudden swelling. These symptoms need assessment rather than a change in supplement timing.

Ask whether your blood count and iron stores have been checked, how to separate the supplements, which formulation suits you, and when results should be reviewed.