POPs and Pubertal Timing: Evidence of Delayed Development

Endocrine disruptors have been eyed as potential drivers of a steady trend toward earlier puberty among girls worldwide in recent decades, particularly with regard to breast development. However, when the authors of a study in the October issue of EHP evaluated serum levels of three common classes of hormonally active persistent organic pollutants in relation to the timing of pubertal onset in girls, they found, contrary to initial hypotheses, that higher exposures were associated with later puberty, not earlier.

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