Hello, How does the white mass and/or hormones in the brain change with gender fluid identity? [Despite being bad at science, I do like looking at biology and genetics]. Thank-you.
You mean white matter? First of all, the difference between male and female brains is important. Female fetuses have a thicker corpus callosum (the nerves that connect the left and right sides of the brain), even in fetuses. Women also have more white matter, a larger hypothalamus, and less somatostatin neurons than men. However, the biggest differences in the sexes are which hemispheres they use. Now, for how this relates to transgender and genderfluid people. Trans women have female brains, and trans men have male brains--post-HRT or pre-HRT. Cisgender males and females who have had unusual hormone exposure still have the brains of their gender. Levels of white matter change as a person gets older, but in the case of a genderfluid person, it would not change situationally. Hormone levels, scientists aren't sure about. The study on genderfluid people (alternating gender incongruity, or AGI) showed that they switch which hemispheres they think with, rather than their actual brain structure--I assume that some could have male brain structure, some female. This also brings up a distinction medically between binary trans people, and non-binary people. Dysphoric, binary trans people, and people with non-binary sex dysphoria who wish to transition to the opposite sex have the brain structure and brain map of the opposite sex at birth. People with non-binary sex dysphoria who live as their birth sex and have no desire to medically transition have the brain map of a different sex, but not the brain structure of the opposite sex assigned at birth. Transgender-identified people who don't have dysphoria this does not apply to, because that's more based on expression than a medical cause--nondysphoric genderfluid people don't have AGI.
