[Gestational hypothyroxinemia and cognitive functions of offsprings]

То study the impact of gestational hypothyroxinemia on the neurointellectual prognosis in infants living in an industrial megapolis who had mild-to-moderate iodine deficiency, the authors used a "Gnome" mental development scale to assess cognitive function in 13 babies bom to mothers who had first-trimester gestational hypothyroxinemia corrected with thyroid hormonal preparations and in 10 babies born to mothers who had normal free thyroxine levels when the babies were 6,9, and 12 months old. The study indicated that the maternal level of free thyroxine in early (at weeks 5-9) pregnancy significantly correlated with the mental development index of babies at the age of 6,9, and 12 months, i.e. it is one of the determinants of offspring's nervous and mental development. Moreover, early (not later than 9 weeks of pregnancy) correction of gestational hypothyroxinemia with levothyroxine in a mean daily dose of at least 1.2 fig/kg improves the prognosis of progeny's neurointellectual prognosis, by increasing the mental development index up to 92-97 scores in babies in the first year of life, which are consistent with that in babies bom to mothers having normal thyroxine levels.