4min chapter

The Art of Manliness cover image

What the World of Psychology Gets Wrong About Men

The Art of Manliness

CHAPTER

The Effects of Testosterone on Male Muscle Mass

There's a testosterone surge at 13 weeks, prenatally. And this causes all sorts of changes to the fetus,. Some of which are only then seen at puberty when you have another massive surge. In that fetus, the levels that it experiences then are as high as those experiencing adolescent boys. So there's a huge amount of nature or biology going on there. If you're somebody who happens to find themselves bigger and stronger than other people around you, it's probably going to affect the way that you feel and behave.

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