Maternal Thyroid Function in Early Pregnancy and Offspring School Performance and Neurodevelopmental Disorders
The Journal of Clinical Endocrinology & Metabolism, vol. 110, pp. e1000–e1008
Abstract
CONTEXT: Thyroid hormones are critical for neural development, and during the first trimester of pregnancy, the fetus relies fully on maternal thyroid hormone production. OBJECTIVE: To investigate the associations between maternal thyroid hormone levels in the first trimester with the child's school performance, risk of attention deficit hyperactivity disorder (ADHD), and autism spectrum disorder (ASD). METHODS: Information from the Copenhagen Primary Care Laboratory Pregnancy Database on first trimester TSH and free thyroxine measurements in mothers of children born in 2000 through 2014 were linked with information on the child's standardized test scores in school, ADHD (patient record diagnoses and medication), and ASD (patient record diagnoses) until the end of 2018. Associations of TSH and free thyroxine with the outcomes were individually assessed by linear mixed models and Cox regression models. The analyses were stratified by preexisting maternal thyroid disorders. RESULTS: TSH measurements were available for 17 909 mother-child dyads. Among those with children born in 2000 through 2009, 6126 had a standardized school test score and were analyzed for the association between maternal thyroid hormone levels and child's school performance, and no support for an association was found. The association between thyroid hormone levels and child's risk of ADHD and ASD were analyzed for the 17 909 dyads and with no support for an association between thyroid hormone levels and these neurodevelopmental disorders. Stratification by preexisting maternal thyroid disorders did not affect the results. CONCLUSION: We found no evidence for associations between first trimester maternal thyroid hormone levels and child's school performance, or risk of ADHD or ASD.
Authors 8
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Line Tang Møllehave corresponding
Frederiksberg Hospital · Bispebjerg Hospital · Center for Clinical Research and Prevention
Affiliation as printed
Center for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital , 2000 Frederiksberg ,
Center for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital , 2000 Frederiksberg , Denmark
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Affiliation as printed
Department of Public Health, Research Unit for General Practice and Section of General Practice, University of Copenhagen , 1353 Copenhagen K ,
Department of Public Health, Research Unit for General Practice and Section of General Practice, University of Copenhagen , 1353 Copenhagen K , Denmark
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Affiliation as printed
Department of Public Health, Research Unit for General Practice and Section of General Practice, University of Copenhagen , 1353 Copenhagen K ,
Department of Public Health, Research Unit for General Practice and Section of General Practice, University of Copenhagen , 1353 Copenhagen K , Denmark
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University of Copenhagen · Rigshospitalet
Affiliation as printed
Department of Hematology, Rigshospitalet , 2100 Copenhagen Ø ,
Department of Public Health, Research Unit for General Practice and Section of General Practice, University of Copenhagen , 1353 Copenhagen K ,
Department of Hematology, Rigshospitalet , 2100 Copenhagen Ø , Denmark
Department of Public Health, Research Unit for General Practice and Section of General Practice, University of Copenhagen , 1353 Copenhagen K , Denmark
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Hvidovre Hospital · Copenhagen University Hospital
Affiliation as printed
Department of Clinical Biochemistry, Copenhagen University Hospital Hvidovre , 2650 Hvidovre ,
Department of Clinical Biochemistry, Copenhagen University Hospital Hvidovre , 2650 Hvidovre , Denmark
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Leiden University · Leiden University Medical Center
Affiliation as printed
Department of Internal Medicine, Section of Gerontology and Geriatrics, Leiden University Medical Center , 2300 RC Leiden ,
Department of Internal Medicine, Section of Gerontology and Geriatrics, Leiden University Medical Center , 2300 RC Leiden , the Netherlands
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Leiden University · Leiden University Medical Center
Affiliation as printed
Department of Internal Medicine, Section of Gerontology and Geriatrics, Leiden University Medical Center , 2300 RC Leiden ,
Department of Internal Medicine, Section of Gerontology and Geriatrics, Leiden University Medical Center , 2300 RC Leiden , the Netherlands
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Affiliation as printed
Department of Public Health, Section of Epidemiology, University of Copenhagen , 1353 Copenhagen K ,
Department of Public Health, Section of Epidemiology, University of Copenhagen , 1353 Copenhagen K , Denmark
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