Also , with regards to cis people , there were only two major differences between the cis men and cis women the corpus callosum and the cerebellumIs this accurate ? From what I ' ve read there are a bunch of areas in the brain that differ on average between males and females . That being said I think that trying to analyze brain scans to figure out sexgender differences is always bound to be a fruitless exercise because there are too many factors at play . The effect size of hormones is dependent on age of administration and it ' s interaction with plasticity . We don ' t have any reliable knowledge on how differences in social identity manifest in the brain I ' m sure that such a thing is plausible . The only thing that does make sense is that the neurological effect on hormones would affect sexual behaviour , since that is the most significant difference between the sexes , and yet sexual orientation seems to be mostly unaffected by hormone administration as is the SDN . I think the only reliable way to really find out about all of these neurological reactions is to conduct exhaustive human testing , specifically during the development of gender identity ages 24 . Probably not gonna happen , so we ' re gonna continue running around in circles with a bunch of n 20 studies that basically just say yeah it ' s kind of a wash each time .