Babies born to mothers with mild anaemia exhibit a 4% reduction in overall brain volume and structural differences in key regions linked to movement, learning, and emotion regulation by their first birthday, according to a study published in the journal Brain Communications.
Study Findings on Infant Brain Development and Maternal Anaemia
More than a third of pregnant women worldwide experience anaemia, a condition typically driven by iron deficiency that lowers the standard red blood cell count. Symptoms include dizziness, fatigue, and shortness of breath, with the highest regional rates concentrated in south Asia and sub-Saharan Africa. King’s College London and University of Cape Town researchers scanned infant brains multiple times from three months to two years of age using specialized portable low-field MRI scanners alongside traditional high-field machines. The scans revealed volumetric differences localized in three distinct brain structures: the putamen, caudate nucleus, and corpus callosum.
“All three of these brain regions are implicated in key neuropsychological functions,” said Jessica Ringshaw, the study’s first author and a researcher at King’s Institute of Psychiatry, Psychology & Neuroscience (IoPPN) and the University of Cape Town. Ringshaw pointed to processing speed, executive function, and emotion regulation as primary examples tied to these specific areas. Because the mothers and infants in the observed cohorts shared nearly identical household income and food security statuses, researchers attribute the structural brain differences directly to maternal anaemia.
Long-Term Cognitive Impacts on School-Age Children
The structural deficits observed in infancy do not naturally correct themselves as children grow older, according to previous South African research tracking older toddlers and school-age children. The corpus callosum measured approximately 4% smaller at 12 months in infants born to anaemic mothers, but that deficit expanded to 6% by 24 months. “These aren’t children who are catching up, where the brain differences are disappearing over time,” Ringshaw said. These persistent changes remain visible when children reach six years of age and enter formal schooling, potentially manifesting as tangible cognitive difficulties.
Identifying iron deficiency early allows clinicians to administer targeted interventions such as oral or intravenous iron supplementation where appropriate.
These structural findings provide a biological mechanism for earlier studies demonstrating that children born to anaemic mothers consistently score lower on developmental assessments. Furthermore, the study noted higher rates of anaemia among women living with HIV, pointing to complex underlying causes that require integrated public health strategies.
Public Health Recommendations and Portable MRI Technology
Although the World Health Organization prioritizes reducing anaemia rates, progress has stalled over the past two decades. “Now more than ever, anaemia needs to be placed at the forefront of public health efforts if we are to ensure that children are not only surviving but thriving,” Ringshaw said. Recommended interventions include routine screening during pregnancy, iron supplementation, and comprehensive management of infectious diseases.
The research methodology itself marks a significant technological advancement. By validating affordable, portable low-field MRI scanners against conventional hospital machines, the team proved that advanced neuroimaging can be deployed in challenging environments. Steve Williams, a professor of neuroimaging at King’s, noted that this novel technology successfully measures the impact of malnutrition on developing brains at scale, providing an early and sensitive assessment tool for future public health interventions.
Did You Know?
Portable low-field MRI scanners are cheaper and more portable than the conventional machines used in hospitals.
Frequently Asked Questions
What is maternal anaemia?
Maternal anaemia is a condition typically caused by iron deficiency in which the number of red blood cells in the body is lower than normal.
Which brain regions are affected by maternal anaemia?
According to the study, differences were recorded in three specific regions of the brain: the putamen, caudate nucleus and corpus callosum.
Do these brain differences improve as the child grows?
Previous research shows the developmental gaps do not disappear over time, remaining detectable when children reach six years of age and start school.
How can maternal anaemia be prevented or treated?
Researchers recommend routine screening during pregnancy, proper management of infections like HIV, and the use of oral or intravenous iron supplementation.
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