The CHAMACOS study published on October 4 in Environmental Health perspectives could associate maternal urinary Bisphenol A (BPA) levels with total T4 level in pregnant women as well as reduced thyroid stimulating hormone (TSH) in newly born boys. Maternal urinary BPA levels could not be linked to new borne girl’s TSH levels. The association with maternal T4 levels was limited to the urinary BPA measurement closest in time to the thyroid hormone measurement. Regarding the TSH level of male neonates, the association was significant when related to the average maternal BPA concentration (Chevrier et al. 2012).

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Environmental Factor (U.S. National Institute for Environmental Health Sciences)