The Journal of clinical endocrinology and metabolism · 2026
Maternal Thyroid Hormone Imbalance and Risk of Autism Spectrum Disorder.
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Elbedour Leena, Weinberg May, Meiri Gal, Michaelovski Analya, Menashe Idan
Аннотация
CONTEXT: Maternal thyroid hormones are essential for fetal neurodevelopment. Gestational thyroid imbalance has been associated with atypical neurodevelopment, including increased risk of autism spectrum disorder (ASD).
OBJECTIVE: To examine the association between maternal thyroid dysfunction and ASD risk in offspring.
DESIGN: Retrospective cohort study with follow-up through January 2021.
SETTING: Single tertiary hospital in southern Israel (Soroka University Medical Center); linked to Clalit Health Services electronic records.
PATIENTS OR OTHER PARTICIPANTS: A total of 51 296 singleton births between January 2011 and December 2017.
INTERVENTION(S): None.
MAIN OUTCOME MEASURE(S): Offspring ASD diagnosis (Diagnostic and Statistical Manual of Mental Disorders, fifth edition).
RESULTS: A total of 4409 (8.6%) of the mothers showed abnormal thyroid function. ASD cumulative incidence was similar in the offspring of women with normal and abnormal thyroid function (log-rank P = .27). While chronic hypothyroidism only (reflecting likely adequate treatment) was not significantly associated with ASD [adjusted hazard ratio (aHR), 0.47; 95% confidence interval (CI), 0.15-1.48], combined chronic and gestational hypothyroidism was associated with higher ASD risk (aHR, 2.61; 95% CI, 1.44-4.74). Trimester-specific analysis indicated a dose-response effect, in which the longer the period of hypothyroidism, the higher the ASD risk, namely, for 1, 2, or 3 trimesters of exposure: aHR, 1.69 (95% CI, 1.19-2.83); aHR, 2.39 (95% CI, 1.24-5.78); aHR, 3.25 (95% CI, 1.07-7.21), respectively.
CONCLUSION: The findings suggest adequately treated chronic hypothyroidism is not associated with ASD in offspring, whereas persistent hormonal imbalance across trimesters conveys elevated risk. These findings underscore the importance of routine thyroid function screening and timely treatment throughout pregnancy.
OBJECTIVE: To examine the association between maternal thyroid dysfunction and ASD risk in offspring.
DESIGN: Retrospective cohort study with follow-up through January 2021.
SETTING: Single tertiary hospital in southern Israel (Soroka University Medical Center); linked to Clalit Health Services electronic records.
PATIENTS OR OTHER PARTICIPANTS: A total of 51 296 singleton births between January 2011 and December 2017.
INTERVENTION(S): None.
MAIN OUTCOME MEASURE(S): Offspring ASD diagnosis (Diagnostic and Statistical Manual of Mental Disorders, fifth edition).
RESULTS: A total of 4409 (8.6%) of the mothers showed abnormal thyroid function. ASD cumulative incidence was similar in the offspring of women with normal and abnormal thyroid function (log-rank P = .27). While chronic hypothyroidism only (reflecting likely adequate treatment) was not significantly associated with ASD [adjusted hazard ratio (aHR), 0.47; 95% confidence interval (CI), 0.15-1.48], combined chronic and gestational hypothyroidism was associated with higher ASD risk (aHR, 2.61; 95% CI, 1.44-4.74). Trimester-specific analysis indicated a dose-response effect, in which the longer the period of hypothyroidism, the higher the ASD risk, namely, for 1, 2, or 3 trimesters of exposure: aHR, 1.69 (95% CI, 1.19-2.83); aHR, 2.39 (95% CI, 1.24-5.78); aHR, 3.25 (95% CI, 1.07-7.21), respectively.
CONCLUSION: The findings suggest adequately treated chronic hypothyroidism is not associated with ASD in offspring, whereas persistent hormonal imbalance across trimesters conveys elevated risk. These findings underscore the importance of routine thyroid function screening and timely treatment throughout pregnancy.