The eyes have it: Men do see things differently to women
The way that the visual centers of men and women’s brains works is different, finds new research published in BioMed Central’s open access journal Biology of Sex Differences. Men have greater sensitivity to fine detail and rapidly moving stimuli, but women are better at discriminating between colors.
Yep, my point being that a trans man (AFAB) and a cis man (AMAB) both have their bed nucleus of the stria terminalis roughly the same size, twice the size of a woman’s. A woman’s is half the size of a man’s, regardless of whether she’s trans (AMAB) or cis (AFAB). So regardless of what the gender is assigned at birth, the relative size of the bed nucleus predicts the gender that the individual feels most comfortable as.
Has this been proven.
There’s evidence, but I don’t know enough of the science to tell how conclusive it is: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7139786/#:~:text=Regarding grey matter%2C the main,the anterior hypothalamus (INAH3).