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The Pediatric Forum
Jan 2012

Exposure to Magnetic Fields During Pregnancy and Asthma in Offspring

Author Affiliations

Author Affiliations: Population Studies Division, Health Canada, Ottawa, and Division of Occupational and Environmental Health, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario.

Arch Pediatr Adolesc Med. 2012;166(1):97. doi:10.1001/archpedi.166.1.97-a

Li et al1 reported associations between prenatal exposure to magnetic fields and childhood asthma. They measured exposure to magnetic fields in pregnant women using personal monitoring and then examined their associations with newly diagnosed asthma among offspring. Each 1-mG increase in maternal magnetic field levels was associated with a 15% increased risk of asthma.