Environmental Science
8 years ago

High prenatal lead exposure linked to lower cognitive development in infants.

New England Journal of Medicine
Longitudinal Analyses of Prenatal and Postnatal Lead Exposure and Early Cognitive Development
David Bellinger, Alan Leviton, Christine Waternaux, Herbert L. Needleman, Michael Rabinowitz

Paper Summary

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The study looked at how lead exposure before and after birth affects babies' brain development. They measured lead levels in babies' blood and tested their cognitive skills every six months for two years. Babies with higher lead exposure before birth scored lower on cognitive tests compared to those with lower exposure. Lead levels after birth didn't seem to affect their scores. Even low levels of lead in the blood can harm a baby's brain development, not just higher levels as previously thought.