Weight Faltering in Infancy and IQ Levels at 8 Years in the Avon Longitudinal Study of Parents and Children

Abstract

Failure to thrive in infancy was associated with persisting deficits in IQ at 8 years; the critical period for growth faltering was birth to 8 weeks. The relationship between infant growth from birth to 8 weeks and later intellectual development was approximately linear over the whole range of weight velocities.