Transgender Athletes, Evidence, and Policy A study has been making the rounds and has been published in BMJ. It is a meta-analysis of various research, providing strong scientific evidence focused specifically on sports. I don't think it will change much; just like a single study or court case won't eliminate transgender people or stop transphobia. It’s clear that trans women who have been on hormones for 1 to 3 years, especially longer, do not have a significant advantage on average.