18 , 28 We observed a positive association during the first trimester of pregnancy between exposure to PM 2.5 and PM 1–2.5 and thyroid autoimmunity with TPOAb positivity, while the association of PM 1 exposure with maternal thyroid autoimmunity showed a trend similar to that of PM 2.5 exposure, although without statistical significance.
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Associations of Ambient Particulate Matter with Maternal Thyroid Autoimmunity and Thyroid Function in Early Pregnancy.
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