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Study links iodine deficiency in pregnancy with poor cognitive outcomes in children

BMJ 2013; 346 doi: https://doi.org/10.1136/bmj.f3365 (Published 23 May 2013) Cite this as: BMJ 2013;346:f3365
  1. Lola Loewenthal
  1. 1London

A study of nearly 1000 pregnant women from the United Kingdom has found that two thirds were deficient in iodine and that this deficiency was associated with a lower IQ and poorer reading ability in their children.1

The Lancet study used stored urine samples and data from the Avon Longitudinal Study of Parents and Children (ALSPAC), also known as “the children of the 90s cohort.”

Iodine concentrations were measured in 958 urine samples taken in the first trimester of pregnancy and correlated with the IQ of the children when they were 8 years old and with their reading …

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