We have blogged previously about the ongoing debate regarding the treatment of subclinical hypothyroidism in pregnancy (here and here).  In brief, there was a study published in 1999 that demonstrated that 7-9 year old children, from women with abnormal thyroid measurements during pregnancy, performed slightly less well than the control children on 15 IQ tests. Of the 62 women with thyroid disease who were not treated for their hypothyroidism 48 had children who had significantly lower IQ scores than the control children. This report led to a number of follow-up studies to support or refute this study.

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