Sex differences in the brain's serotonin system

http://www.physorg.com/news122122203.html
02/13/2008

Their results, which are to be presented in a doctoral thesis by Hristina Jovanovic at the end of February, show that women have a greater number of the most common serotonin receptors than men. They also show that women have lower levels of the protein that transports serotonin back into the nerve cells that secrete it. It is this protein that the most common antidepressants (SSRIs) block.

I wonder what the results in transpeople would look like...

I also wonder whether the difference would be related to hormones in the body, in which case HRT would throw things off...

Lia