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Thyroid dysfunction during pregnancy negatively impacts newborn neurodevelopment, with varying effects based on the specific thyroid condition. Lower FT4/FT3 and higher TSH levels in affected newborns correlate with poorer neurodevelopmental scores.

Keywords:
impact analysisindependent risk factorsneonatal neurodevelopmentpregnancythyroid dysfunction

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Area of Science:

  • Endocrinology
  • Neonatal Neurology
  • Maternal-Fetal Medicine

Background:

  • Thyroid hormones are crucial for fetal brain development.
  • Maternal thyroid dysfunction during pregnancy can potentially affect offspring neurodevelopment.
  • Understanding the specific impact of different thyroid dysfunction types is essential.

Purpose of the Study:

  • To investigate the association between maternal thyroid dysfunction and neonatal neurodevelopmental outcomes.
  • To compare neurodevelopmental assessments between newborns of mothers with and without thyroid dysfunction.
  • To analyze the influence of specific types of thyroid dysfunction on neonatal neurobehavioral assessments.

Main Methods:

  • Prospective study comparing a thyroid dysfunction group (TDG, n=92) with a normal control group (NCG, n=150).
  • Neonatal Behavioral Neurological Assessment (NBNA) performed on newborns.
  • Serum thyroid hormones (TSH, FT4, FT3) measured in newborns; maternal thyroid status categorized.

Main Results:

  • Newborns in the TDG exhibited significantly lower total NBNA scores, FT4, and FT3 levels, and higher TSH levels compared to the NCG (P < 0.001).
  • Neurodevelopmental outcomes varied significantly across different types of maternal thyroid dysfunction (P < 0.05).
  • Total NBNA score negatively correlated with TSH (r=-0.242, P<0.05) and positively with FT4 (r=0.464, P<0.05) and FT3 (r=0.383, P<0.05) in the TDG.

Conclusions:

  • Maternal thyroid dysfunction during pregnancy significantly impacts neonatal neurodevelopmental outcomes.
  • The specific type of thyroid abnormality influences the severity of neurodevelopmental effects.
  • These findings highlight the importance of monitoring and managing thyroid health in pregnant individuals.