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Maternal thyroid function during early pregnancy and cognitive functioning in early childhood: the generation R study
Jens Henrichs1, Jacoba J Bongers-Schokking, Jacqueline J Schenk
1The Generation R Study, Erasmus Medical University Center, 3000 DR Rotterdam, The Netherlands.
The Journal of Clinical Endocrinology and Metabolism
|June 11, 2010
Summary
Maternal hypothyroxinemia in early pregnancy is linked to a higher risk of cognitive delays in children. This study highlights the importance of monitoring thyroid function during pregnancy for optimal child neurodevelopment.
Area of Science:
- Endocrinology
- Developmental Psychology
- Public Health
Background:
- Thyroid hormones are crucial for fetal neurodevelopment.
- Limited population data exist on maternal thyroid function and child cognition.
Purpose of the Study:
- To investigate the association between maternal thyroid hormone levels in early pregnancy and children's cognitive development.
- To examine the impact of maternal hypothyroxinemia and thyroid-stimulating hormone (TSH) and free thyroxine (FT4) levels on cognitive outcomes.
Main Methods:
- Population-based cohort study in The Netherlands with 3659 mother-child pairs.
- Maternal thyroid function (TSH, FT4) assessed at 13 weeks gestation.
- Children's cognitive functioning (expressive vocabulary, verbal and nonverbal skills) assessed at 18 and 30 months.
Main Results:
- Maternal TSH levels showed no association with cognitive outcomes.
- Increased maternal FT4 levels were linked to a reduced risk of expressive language delay at 30 months.
- Both mild and severe maternal hypothyroxinemia were associated with increased risk of expressive language delay.
- Severe maternal hypothyroxinemia also predicted a higher risk of nonverbal cognitive delay.
Conclusions:
- Maternal hypothyroxinemia during early pregnancy is a significant risk factor for cognitive delay in children.
- These findings underscore the importance of maternal thyroid health for child neurodevelopment.
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