Smaller Birth Size Linked to Lower Academic Performance
New research shows that babies born smaller than average face potential learning challenges persisting into their mid-teens.
Updated on Oct. 22, 2026 in Children’s Health
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A study from the University of Warwick links lower birth size among full-term infants to reduced academic performance in mathematics and reading. Researchers found these gaps in test scores persist as children reach their mid-teens.
Why it matters
Being small for gestational age at term may signal underlying effects on the brain that impact long-term learning capabilities. This study helps identify potential early indicators of future academic challenges for children.
The study analyzed 92,551 children born at 37 to 41 weeks of gestation. Researchers compared academic performance test results for children measured between the ages of 10 and 15.
The players
University of Warwick
An academic institution based in the UK that led the research study and currently holds a 68th global ranking.
The details
Researchers linked data from the Norwegian Mother, Father and Child Cohort Study with national education records and the Medical Birth Registry of Norway. While babies born at 37-38 weeks showed early differences in language and motor skills, these developmental disparities typically resolved by age five.
Timeline
October 22, 2026: The study findings were published.
Ages 10-15: Academic performance was measured for study subjects.
The Big Picture
This research follows the established longitudinal tracking of the Norwegian Mother, Father and Child Cohort Study to observe neurodevelopmental trajectories. By utilizing this framework, scientists can bridge gaps between birth metrics and adolescent cognitive outcomes.
Parents may use these findings to discuss early neurodevelopmental monitoring with pediatricians for infants born on the smaller side of the spectrum. The study highlights the importance of early intervention if developmental language or motor delays appear in the first five years.
The takeaway
Early physical development markers serve as an important tool for predicting future academic success. Monitoring developmental milestones in the first five years remains a critical practice for supporting long-term educational outcomes.
Further reading
Learn more about early childhood development trends in our Children’s Health section.
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