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Abnormalities of maternal thyroid function during pregnancy affect neuropsychological development of their children

Yuanbin Li1, Zhongyan Shan, Weiping Teng

  • 1Department of Endocrinology and Metabolism, The First Hospital, China Medical University, Shenyang Maternal and Neonatal Health Clinic, P.R. China.

Clinical Endocrinology
|November 3, 2009
PubMed

Insights

Maternal thyroid abnormalities during pregnancy, including subclinical hypothyroidism, hypothyroxinaemia, and elevated thyroid peroxidase antibody titres, are linked to lower intellectual and motor development in children. These conditions predict poorer neuropsychological outcomes by 25-30 months of age.

Area of Science:

  • Endocrinology
  • Neurodevelopmental Pediatrics
  • Reproductive Medicine

Background:

  • Thyroid hormones are crucial for fetal brain development.
  • Maternal thyroid dysfunction during pregnancy is a growing concern.
  • The impact of specific thyroid abnormalities on offspring neurodevelopment requires further elucidation.

Purpose of the Study:

  • To investigate the association between maternal thyroid abnormalities and the neuropsychological development of offspring.
  • To assess the impact of subclinical hypothyroidism, hypothyroxinaemia, and elevated thyroid peroxidase antibody titres on child development.

Main Methods:

  • Serum samples from 1268 pregnant women (16-20 weeks gestation) were analyzed for TSH, tT(4), fT(4), and TPOAb.
  • Thyroid abnormalities were identified using pregnancy-specific reference ranges.
  • Children's intellectual and motor development was assessed at 25-30 months of age.

Main Results:

  • Children born to mothers with subclinical hypothyroidism, hypothyroxinaemia, or elevated TPOAb titres exhibited significantly lower mean intelligence and motor scores.
  • Maternal TSH, tT(4), and TPOAb levels were independently associated with reduced intellectual and motor scores in offspring.
  • Multivariate logistic regression confirmed these associations, with significant odds ratios for lower neurodevelopmental outcomes.

Conclusions:

  • Maternal thyroid dysfunction during early gestation is a significant predictor of impaired child neuropsychological development.
  • Subclinical hypothyroidism, hypothyroxinaemia, and elevated TPOAb titres in mothers are associated with lower intellectual and motor development in children at 25-30 months.
  • Early identification and management of maternal thyroid abnormalities are crucial for optimizing offspring neurodevelopment.
Abstract

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