You can also, with a prescription, go to a compounding pharmacy and get testosterone cream, which is the most cost effective method of taking supplemental testosterone on a regular basis.
I'm not sure how about the half life for any single large dosage, and don't know the method used nor the dosage used in the anecdote given. And no, my ex did not repeat the experiment, nor do I recall her mentioning any controls being taken. I don't think the paper came from a scientific journal - knowing my ex, I'm sure of it. More likely the New Yorker.
There are studies about the effects of testosterone supplementation on mood and depression.
Upon reading Eliezer's possible gender dystopias ([catgirls](http://lesswrong.com/lw/xt/interpersonal_entanglement/), and [verthandi](http://lesswrong.com/lw/xu/failed_utopia_42/) and the other LW comments and posts on the subject of future gender relations, I came to a rather different conclusion than the ones I've seen espoused here. After searching around the internet a bit, I discovered that my ideas tend to fall under the general category of "postgenderism", and I am wondering what my fellow LessWrongians think of it.
This can generally be broken down to the following claims:
EDIT- Due to some really insightful comments;
I replaced men being prone to aggression as a negative, with men being prone to suicide.
I made the verbiage a little more explicit that no one would be *forced* to change, but would seek out the changes that transhumanism would have available.