Has anyone measured trans athletes performance? I see this topic come up repeatedly in different guises, protect women from the evil trans-agenda. But I haven't seen where this is actually a problem. Do trans-athletes regularly out perform "born as" (not sure the best way to phrase it) athletes?
The usual term is "cisgender", or "cis" for short.
"Cis" and "Trans" both come from Latin; the former means "the same side of" and the latter means "the other side of". If you are happy to be on the same side of the gender binary as what you were assigned when you were born then you are "cisgender"; if you are unhappy with that state of affairs (regardless of how much work you have put into changing it) then you are "transgender".