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mk · 1786 days ago · link · · parent · post: 'I Am A Woman': Track Star Caster Semenya Continues Her Fight To Compete As A Female
I assume you mean cisgendered in a biological (XY or XX) sense? If so, then it seems that chromosome is a better divisor as testosterone levels aren't consistent in one individual, and as testosterone is just one factor in numerous downstream biological differences due to the sex chromosome difference.