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Influencia de la hipotiroxinemia materna durante la gestación sobre el desarrollo psicomotor
Other Titles: Influence of maternal hypothyroxinaemia during pregnancy on psychomotor development
Authors: Suarez-Rodriguez, M. (M.)
Azcona-San-Julian, M.C. (María Cristina)
Alzina, V. (Valentín)
Keywords: Hypothyroxinaemia
Psychomotor development
Thyroid function
Issue Date: 2008
Publisher: Elsevier España
Publisher version:
ISSN: 1695-4033
Citation: Suarez Rodriguez M, Azcona San Julian C, Alzina de Aguilar V. Influencia de la hipotiroxinemia materna durante la gestación sobre el desarrollo psicomotor. An Pediatr (Barc) 2008 Nov;69(5):420-425.
The maternal thyroid function during early pregnancy plays a fundamental role in foetal brain development as synthesis of thyroid hormone does not begin until the 20th week of gestation. Material and methods Throughout the year 2002, 147 women in their 37th week of pregnancy were enrolled for the study. To evaluate their thyroid function, the serum concentrations of free T4 and of TSH were determined. After birth, the psychomotor development of their children was evaluated with the Mc- Carthy scales. Results The median value of free T4 was 9.37 pmol/l, being the data obtained from more than half of the sampled women below the hypothyroxinaemia threshold. Children born from mothers with T4 levels below percentile 10 showed a significantly lower score on the general cognitive index than those whose mothers had normal free T4 serum concentrations. A positive correlation was found between the values of maternal free T4 and the general cognitive index (r 0.43; p < 0.01). Conclusions The concentrations of maternal free T4 are important, not only during the first months of pregnancy, but all along the process to ensure adequate development of the foetal brain.
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