Maternal Anaemia Stunts Infant Brain Growth, Study Finds
Recent neuroimaging research demonstrates that maternal anaemia significantly alters early childhood neurodevelopment. Specifically, infants born to mothers with antenatal anaemia display up to four percent smaller total brain volumes by two years of age. Furthermore, researchers identified reductions of up to six percent in critical subcortical structures. Therefore, these findings provide compelling neurobiological evidence that maternal nutrition directly influences infant neuroanatomy.
Researchers from King's College London and the University of Cape Town led the investigation. Additionally, the team utilized both high-field and portable ultra-low-field MRI scanners to evaluate infant neurodevelopment. Consequently, the researchers tracked 394 mother-infant pairs from birth through twenty-four months of age.
Impact of Maternal Anaemia on Regional Brain Development
Volumetric disparities emerged clearly from twelve months of age onward. In fact, infants exposed to maternal anaemia exhibited a 3.77 percent smaller intracranial volume across early life. Furthermore, specific subcortical structures sustained prominent volumetric decrements. For example, researchers observed a 3.32 percent volume reduction in the infant putamen.
Additionally, the gap between cohorts widened steadily as the children developed. By twelve months, the corpus callosum showed a four percent size reduction in exposed children. However, this deficit expanded to six percent by twenty-four months. Notably, the putamen, caudate nucleus, and corpus callosum regulate vital neurological tasks. These essential structures govern motor planning, emotional regulation, executive control, and interhemispheric communication.
Clinical Significance and Antenatal Management
Crucially, these structural differences manifested even when mothers experienced only mild anaemia during pregnancy. Therefore, clinicians must recognize that even borderline haemoglobin deficits can impair fetal brain programming. Moreover, overlapping factors like infectious disease and undernutrition frequently exacerbate this risk in endemic regions.
Consequently, healthcare providers must prioritise early screening for iron deficiency throughout pregnancy. Thus, timely oral or parenteral iron therapy can reliably preserve maternal haemoglobin levels. Ultimately, proactive prenatal interventions safeguard fetal neurodevelopment and support long-term cognitive health.
Frequently Asked Questions
Q1: How does maternal anaemia affect an infant's brain structure?
Maternal anaemia reduces overall infant brain volume and significantly shrinks key structures like the putamen, caudate nucleus, and corpus callosum.
Q2: Can mild anaemia during pregnancy still impact infant brain development?
Yes, researchers observed significant reductions in infant brain volume even when mothers had only mild anaemia during gestation.
Q3: At what age can clinicians detect these neurodevelopmental differences?
Clinicians and researchers can detect measurable differences in brain volumes starting from twelve months of age, with disparities widening by twenty-four months.
References
- Anaemia in pregnancy related with smaller brain volume of infant: Study - ETHealthworld
- Ringshaw JE, Zieff MR, Bourke NJ, et al. Antenatal maternal anaemia and infant brain structure: high-field (3 T) and ultra-low-field (64 mT) MRI findings from South Africa. Brain Communications. 2026;8(5):fcag318.
- King's College London. Anaemia in pregnancy linked to differences in babies' brain development. Press Release. September 2026.
