Sex hormone progesterone to get head injury trial

News story on the BBC web site:

http://news.bbc.co.uk/2/hi/science/nature/8525777.stm

Previous studies have shown that progesterone supports the normal development of neurons in the brain, and that the hormone has a protective effect on damaged brain tissue.

If it supports the development of neurons in the brain it might explain quite a few things.

I wonder if they will be looking for any "unusual" side effects? Perhaps a change in clothing tastes?