What does iron therapy mean in pregnancy?

Pregnancy increases the body's need for iron as blood volume changes and the placenta and fetus develop. A clinician may recommend iron after reviewing haemoglobin, iron stores, symptoms, diet, bleeding, and previous results. Tablets are often considered first when they can be tolerated and absorbed. An infusion may be discussed when tablets are unsuitable or when iron needs to be restored under supervision.

Low iron can contribute to tiredness, reduced exercise tolerance, paleness, dizziness, or breathlessness, although these symptoms can have other causes in pregnancy. Iron treatment should follow testing and maternity advice rather than self-dosing.

Take prescribed iron as directed and ask how to manage nausea, constipation, or changes in stool colour. Tell your maternity team about other supplements, medicines, digestive conditions, dietary restrictions, and any bleeding. Keep blood-test and antenatal appointments so treatment can be adjusted as pregnancy progresses. Do not double a missed dose unless your clinician specifically instructs you.

Read the broader guide to [Iron Therapy](/treatments/medical-gynaecology/iron-therapy/).

Seek urgent pregnancy care for heavy bleeding, fainting, chest pain, severe breathlessness, a severe headache with vision changes, or a marked reduction in fetal movement after you have been advised how to monitor it. Contact your team promptly if vomiting prevents you keeping tablets down, side effects are severe, or weakness and dizziness are worsening. During an infusion, report breathing difficulty, facial swelling, hives, or sudden dizziness immediately.

What do my blood results show about iron stores and haemoglobin? Which form of treatment fits my pregnancy, how should I take it, and when will we check the response? What can I do if constipation or nausea makes tablets difficult?