The importance of iron deficiency in pregnancy on fetal, neonatal, and infant neurodevelopmental outcomes

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Abstract
The role of iron in neurodevelopment has long been recognized, and the adverse effects of early‐life iron deficiency on brain development and subsequent function across the lifespan continue to be a subject of research. A greater appreciation of the contribution of maternal preconceptional iron status and fetal iron accretion to offspring, postnatal iron status, and brain health across the lifespan has occurred over the past decade. This paradigm shift in thinking links two previously relatively siloed literatures: neonatal iron deficiency and postnatal iron deficiency. The understanding that iron accretion during the fetal period strongly influences postnatal iron balance has led to an appreciation of the importance and value of ensuring proper fetal iron loading. This article reviews the dynamics of fetal iron metabolism, the role of iron in the developing fetal brain, the short‐ and long‐term neurobehavioral consequences of fetal iron underloading, and the potential mechanisms that account for the long‐term effects of fetal/neonatal iron deficiency.

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