/sci/ - Science & Math » Thread #11288408

91KiB, 1184x928, age of menarche puberty girls.jpg

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Earlier maturity

Anonymous Thu 09 Jan 07:34:27 2020 No.11288408 View Reply Original Report

Quoted By: >>11288411 >>11288421 >>11288429 >>11288438 >>11288959 >>11289638 >>11289643 >>11289654

Daily reminder that kids are menstruating/masturbating at increasingly earlier ages.

Anonymous

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Anonymous Thu 09 Jan 2020 07:36:24 No.11288411 Report

Quoted By: >>11288415 >>11288419

>>11288408
inb4
>it's just better nutrition lowering the age of puberty, just like with taller heights and IQs!

Americans stopped getting taller around 1980, but the age of puberty still kept falling.

Anonymous

Anonymous Thu 09 Jan 2020 07:40:03 No.11288415 Report

Quoted By: >>11289577

>>11288411
nutrition is going to make a difference especially fatness
maybe it's the increase in hispanics perhaps they start younger? Can you break it down between race in the US?

Anonymous

Anonymous Thu 09 Jan 2020 07:40:40 No.11288416 Report

Quoted By:

>daily reminder
imagine not only outing yourself as obsessed with child sexuality, but using data at least 30 years old to do.

Anonymous

Anonymous Thu 09 Jan 2020 07:42:08 No.11288419 Report

Quoted By:

>>11288411
yes, this presentation of data is very very credible OP.

Anonymous

Anonymous Thu 09 Jan 2020 07:42:42 No.11288421 Report

Quoted By:

>>11288408
why is 1990 your latest datapoint?

Anonymous

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Anonymous Thu 09 Jan 2020 07:52:46 No.11288429 Report

Quoted By: >>11289581 >>11289668

>>11288408

It's obesity

https://www.ncbi.nlm.nih.gov/m/pubmed/22570951/

>Girls who experienced early menarche are significantly more often overweight/obese. Overweight/obesity may be considered as one of the predictors for the early occurrence of menarche.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5664767/

>Current studies showed that the potential mechanisms of obesity-promoting gonadal axis initiation mainly related to insulin resistance and hyperinsulinemia, hyperandrogens, and leptin. (1) Insulin resistance in obese subjects is associated with compensatory hyperinsulinemia and decrease levels of liver sex hormone binding protein, which increases the estrogen levels and promotes breast development [4,38,39]. (2) Obesity is often accompanied by inflammatory reactions that increase the cytokines and promote the synthesis of androgen; such changes in androgen could precipitate early pubertal development, as seen in patients with congenital adrenal hyperplasia [40]. (3) Studies showed that leptin levels are positively correlated with obesity, which may be associated with leptin resistance, while leptin also stimulates the central pulsatile gonadotropin secretion and triggers the timing of puberty by binding to receptors in the GnRH neurons.

Anonymous

Anonymous Thu 09 Jan 2020 08:01:23 No.11288438 Report

Quoted By:

>>11288408
Good. That means higher potential population growth

Anonymous

Anonymous Thu 09 Jan 2020 14:57:04 No.11288959 Report

Quoted By:

>>11288408
It's the estrogenic hormones in factory farmed meat.

Anonymous

Anonymous Thu 09 Jan 2020 21:05:29 No.11289577 Report

Quoted By:

>>11288415
>maybe it's the increase in hispanics perhaps they start younger?
Not really. White girls are maturing faster as well, and they have big round butts these days.

Anonymous

Anonymous Thu 09 Jan 2020 21:07:18 No.11289581 Report

Quoted By: >>11289668

>>11288429
I'm gonna be honest, I don't buy it. I see tons of girls who are attractive, developing fully at earlier ages with round curvy features.

If it was just obesity, then all of these girls would be chubby lardasses, but that's not the case.

Anonymous

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Anonymous Thu 09 Jan 2020 21:37:46 No.11289638 Report

Quoted By:

>>11288408

Shut up and eat more (((burg)))ers.

Anonymous

Anonymous Thu 09 Jan 2020 21:41:04 No.11289643 Report

Quoted By:

>>11288408
At the same time you see a rise in androgyny.
-Porn
-Endocrine disruptors
-Hormones in meat
-Wireless devices
-Etc.

Not normal, likely pathological.

Anonymous

Anonymous Thu 09 Jan 2020 21:47:58 No.11289654 Report

Quoted By:

>>11288408
Definitely not the shit we eat. Hormones in meat and milk.

Anonymous

Anonymous Thu 09 Jan 2020 21:54:26 No.11289668 Report

Quoted By:

>>11289581
>>11288429
its just higher caloric intake and the estrogenic compounds latent in the western diet, life history transitions are often triggered by things like greater available resources, lower mortality, greater selection for early reproduction since younger mothers are less likely to perish in spite of having slightly less robustness against disease than older mothers.

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