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Are you able to read this?
Sexual differentiation of the human brain in relation to gender identity and sexual orientation - PubMed
It is believed that during the intrauterine period the fetal brain develops in the male direction through a direct action of testosterone on the developing nerve cells, or in the female direction through the absence of this hormone surge. According to this concept, our gender identity (the...pubmed.ncbi.nlm.nih.gov
Are you attempting to claim that you posted that in post #65, which was the post I was addressing? You know that we can just scroll up and see what you actually posted right?
At any rate, the way the conclusions were described in that abstract is at odds with the actual conclusions of the study. The actual conclusions (as opposed to the poorly-worded abstract) were that sexual differentiation of the brain occurs during the second half of pregnancy, independent of sexual differentiation of the genitals, which occurs much earlier. Though direct action of testosterone on the developing nerve cells normally occurs in males, this is not always the case. Sometimes a biological male might not have this hormonal surge, and sometimes a biological female might have it. This could lead to brain chemistry in a biological male more similar to the brain chemistry normally found in biological females, and vice versa.
Gender, as defined by the World Health Organization, refers to the characteristics of women, men, girls and boys that are socially constructed. Brain chemistry is not socially constructed, so the writer of the abstract clearly misspoke by equating brain chemistry with gender.
Insofar as brain chemistry might have some later effect on gender identity, it can obviously only do so in an environment in which the subject is exposed to the constructs of society.