I’ve seen a study which found that the age of puberty (especially female puberty) is dropping rapidly. In 1860 it started around 16.8 and in 2010 it was 10.8. Why is that? Is there any explanation?
In: Biology
Hold up. It was 16, almost 17 in 1860? What
“In 1860 it started around 16.8”
No it didn’t lmao. Not even close.
It has been starting earlier and earlier (mainly due to better nutrition), but 16.8 years old as an average in the 1860’s is laughable.
I think it’s people reaching a higher percentage of body fat at an earlier age. We know body fat attenuates sex hormones, so this will lead to earlier flipping of the switch.
Body fat %.
A female needs X % of body fat to begin puberty. Age isn’t a determinant factor.
There are many studies showing the impact of increased body fat on puberty, including the age at which puberty begins.
i watched a documentary on plastic that talked about this and it scared the shit out of me. there’s an ingredient used in receipts and water bottles called BPA. it used to me used as hormonal birth control but because of low amounts of estrogen it wasn’t very effective but they found that it helped preserve plastic better. however just touching BPA can expose your body to unnecessary levels of estrogen and children drinking from water bottles containing BPA is connected to early onsets of puberty in females.
You’re misinterpreting what I said. Selective breeding does allow things nature couldn’t bring together for various reasons. I’m referring to DNA. Selective breeding hinges on the two things being able to be bred in the first place. Gene manipulation skips that step. I’d call it “playing god” but I’m not a religious person. We have no way to account for how it affects things later on when we can’t see the effects it will have.
ELI5: More fats in our diets have caused it to start earlier. We’ve known this for at least 2 decades if not more.
Puberty is energy intensive. Unlike most of human history our current diet provides plenty of calories.
I’ve seen articles claiming that with weak stats to back it up mostly siting breast development. my grandma, would be 100 now, got married at 14. that was common, so not sure if the whole puberty thing being earlier holds water.
Eating meat, eggs, etc where the source of these edibles were given hormones to increase their output.
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