The article reports that among twins, a higher relative birthweight is linked to slightly higher cognitive performance in childhood and adolescence, with the association strongest for birthweight differences rather than head circumference. The effect appears within twin pairs, suggesting womb-based conditions influence long-term cognition independent of shared genetics and environment.

This topic is of interest to psychology because it illuminates how early physiological development relates to later cognitive outcomes, highlighting the enduring impact of prenatal factors on brain development and the interplay between biology and environment.

Article Title: Differences in birthweight between twins predict later intelligence test scores

Link to PsyPost Article: https://nolinkpreview.com/www.psypost.org/differences-in-birthweight-between-twins-predict-later-intelligence-test-scores/

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