Linear growth and child development are often assumed to have common determinants. The authors assess this assumption through a systematic review and meta-analysis of interventions focused on length-for-age or height-for-age Z scores and child development outcomes for children 0-5 years old and during pregnancy. The researchers found that the determinants of linear growth and neurodevelopment are only partly shared; therefore, interventions should target determinants of both, if children are to thrive.