I watched this documentary about testosterone and how it affects behavior. Nothing new really, but it got me thinking that many of the traits related to high testosterone are also related to MBTIs extroverted types.
Basically it goes like this. When you are in the womb, your body starts pumping up the testosterone at a certain point. If the level is high, you end up being a boy, if the level is low, you are girl. After this the hormone plays a big role at puberty.
So I'm thinking, could the womb testosterone level be the crucial factor in making you extrovert? Or, are these two things linked in other ways? Are there studies?
If it was so, it wouldn't mean that every introvert is a low testosterone guy, since after you are born your mind already is set to a certain behavior but your bodys testosterone level is affected by your surroundings.
(I'm not too sure how this would work out for a girl, though)