asterisk2a + bpa + parenting   2

Puberty Before Age 10 - A New ‘Normal’? - NYTimes.com
the ties between obesity and puberty start at a very young age. As Emily Walvoord of the Indiana University School of Medicine points out in her paper “The Timing of Puberty: Is It Changing? Does It Matter?” body-mass index and pubertal timing are associated at age 5, age 3, even age 9 months. This fact has shifted pediatric endocrinologists away from what used to be known as the critical-weight theory of puberty — the idea that once a girl’s body reaches a certain mass, puberty inevitably starts — to a critical-fat theory of puberty. Researchers now believe that fat tissue, not poundage, sets off a feedback loop that can cause a body to mature.

In addition, animal studies show that the exposure to some environmental chemicals can cause bodies to mature early. Of particular concern are endocrine-disrupters, like “xeno-estrogens” or estrogen mimics.

Family stress can disrupt puberty timing as well. [Evolution?]
evolution  health  childcare  childhood  parenting  bisphenolA  BPA  obesity  epidemic  obesity  hormones  puberty 
april 2012 by asterisk2a

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