t is a truism common to nearly all family gatherings that grandparents will frequently remark on how fast their beloved grandchildren seem to be growing up these days.

But now, instead of provoking a bout of eye-rolling at such platitudes, a new report seems to show the old folks were right: boys are indeed hitting puberty at an earlier age than they used to.

A comprehensive study by the American Academy of Pediatrics was published on Saturday. Widely seen as the best measure of the onset of puberty in American boys, it showed that they are showing signs of puberty six months to two years earlier than previously assumed.

The surprise finding builds on previous discoveries that appeared to show girls have also been developing faster. A study in 2010, which was published in the US Journal of Pediatrics, created headlines when it revealed girls were hitting puberty earlier, with some developing breasts at seven. Nor was it just in the US. Other studies have revealed the same trend in girls all over the world.

Now the AAP study, officially unveiled at a national conference in the US, is showing the same trends in boys. It primarily identified the signs of puberty as the […]

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