04/01/2026
is common in pregnancy and about half of women become anaemic. A normal pregnancy requires about 1000mg of iron for normal baby growth (500mg in the last month when the baby doubles in size). This is a lot of iron and can use a mothers entire reserve stores of iron (held in Ferritin).
A Ferritin below 30 is iron deficiency and can lead to symptoms and anaemia.
Often mothers are advised to take oral iron - but is this enough?? - perhaps not!
A large clinical trial has shown IV iron infusion is better that iron tablets for both mother and baby - more details below: -
In this large clinical trial they compared IV iron infusions with oral iron for women with , not anaemic, at second trimester (11-20 weeks pregnant).
Intravenous iron for non-anaemic iron deficiency in pregnancy: a multicentre, two-arm, randomised controlled trial: The Lancet Haematology; Volume 13, Issue 1e22-e29 January 2026. DOI: 10.1016/S2352-3026(25)00315-1
600 mothers, average 26 years old (23-30) about 65kg (10) with Hb 11·8 (0·6) and Ferritin 14·8 (6·8) received either ORAL iron or IV IRON (1000mg)
Most mothers on ORAL iron had anaemia at delivery - few with IV iron - (Picture)
Haemoglobin at delivery 11·6 (0·5) 10·8 (0·7) 0·74 (0·64– 0·85)