Adjusting the results for external factors likely to affect these scores, such as parental education and breast-feeding, researchers found children of women in the iodine-deficient group were significantly more likely to have low scores of verbal IQ, reading accuracy and reading comprehension.
The lower the mother's concentration of iodine, the lower were the average scores for IQ and reading ability in the children.
More top news
US secretary of state Mike Pompeo will hold talks with Foreign Secretary Dominic Raab and Prime Minister Boris Johnson on a two-day visit.
Milder, but with rain and strong winds in the north
MSPs voted by 64 to 54 in favour of a motion from the First Minister.