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BACKGROUND: ) affects fetal thyroid function and what the impact is on birth weight in normal healthy pregnancies have not been studied yet. OBJECTIVES: exposure on fetal and maternal thyroid hormones and their mediating role on birth weight. METHODS: AGE birth cohort with catchment area in the province of Limburg, Belgium. RESULTS: ). CONCLUSIONS: air pollution was associated with differences in fetal thyroid hormone levels that may contribute to reduced birth weight. Additional research is needed to confirm our findings in other populations and to evaluate potential consequences later in life.
Janssen et al. (Tue,) studied this question.