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I would use the wording of the article, in that hormone is closely linked and associated with certain behavior. There is very little studies (but feel free to provide them) that shows that artificial reduced estrogen will cause a person to get emotional upset.

By regulative I mean that in order to see a major effect, you already need to have a major state. A person with no aggression is not going to get aggressive based on testosterone. A person that is already aggressive will have that aggression regulated if one artificially increasing the circulating testosterone, most often by exaggerating the aggression in a context aware way. For example, a person who has a tendency for road rage won't be more likely to shoot someone, but they might honk the horn more or yell more loudly. Regulative effects don't cause things to happen, but rather modulate what already exist.

Puberty and pregnancy has an other thing in common, in that it both cause changes in the persons neurons. Its speculated the reason that a womans body during pregnancy do this is in order to make it easier form memories and bond with the newborn baby. Its been suggested that some typical pregnancy behaviors is thus a result of those changes to the neurons. I would strongly suspect that hormone levels have a regulative role in facilitating the rate of the changes, but I doubt if measuring the hormone level would be a predictor for how much of a change actually happened.

To bring out an analogy, taxes has an regulative effect on wealth, but its a not a predictor for it. If I selected random individuals over the world and only looked at where they live and how much percent that they pay in taxes, it will tell me nothing about who is rich and who is poor. I have a better time looking at living expensive and food prices, but even that is a poor method to predict how much wealth someone has. I would thus not describe taxes as having a significant effect on wealth, and that wealth per adult is the result of a complex system.




Are there people with no aggression?

I think you may mean (and if this is the case I generally agree) that when hormones trigger behaviors such as road rage, those behaviors have already been learned. Likewise, testosterone is unlikely to cause someone to shoot another driver because significant inhibitions against that behavior have been learned.

But hormones have an effect even in early childhood and before birth, when no behaviors have been learned yet. Prenatal hormones affect brain structure, and studies have found a link between hormones in children as young as 3 months and their choice of toys.[1]

[1] http://www.livescience.com/22677-girls-dolls-boys-toy-trucks...




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