These studies never control for sexual orientation. James Cantor pointed out the flaws in this sort of research almost 3 years ago. There IS evidence of sex differentiation (on AVERAGE) in the brain but it's more predictive of adult sexual preference. http://www.sexologytoday.org/2016/01/on-russos-is-there-something-unique.html …
The account @thehomoarchy has corresponded with many gender therapists and doctors, pleading w/them to care about lesbians being harmed. She did so in good faith originally and now believes they really don't care about the collateral damage. Am sure she can say more about this.