Antenatal thyroid screens unnecessary

Screening for and treating minor hypothyroidism in pregnancy does not improve cognitive function in infants, research finds - lending support to current resistance to mass screening.

In a study of almost 22,000 pregnant women, researchers found no significant difference in offspring IQ scores at age three, regardless of whether mothers underwent screening and treatment for hypothyroidism.

This was despite earlier observational studies linking low maternal thyroid hormone levels to impaired

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