Originally posted at Culturally Bound Gender
When it comes to the issue of identification versus biology, perhaps no place illustrates the discrepancies better than sports.
Athletes like Fallon Fox, who went from being a third-rate MMA fighter in the men’s division to winning all his bouts but one when he went in the ring with women, show that the body discrepancies between an XY and XX human are not simply due to hormones.
Now, many trans activists claim that the fact that Fox lost one of his bouts—and the fact that several sports authorities have agreed to accept men as women if they complete two years of hormone replacement therapy—proves that there is no difference between hormone-altered men and natal women.
This, of course, is based only on studies that show muscle percentages being similar. How are bone density, the differences in body shape, and so on supposed to change? No answer.
The problem becomes clearer when we apply it to an immediately visible aspect of human physiology: height.