I am completely against allowing transgender women like Lia Thomas, who went through male puberty and then later transitioned, to compete in women’s sports.
But in the case of Khelif, it appears that she was BORN with these differences. She was identified as a girl as birth in the usual manner, and then grew up accordingly. It wasn’t until years later, that supposedly the IBA had her tested, and stated that she was genotypically male (XY), and had naturally elevated testosterone levels. This is still somewhat controversial, as the results have never been made public, and the Russian-run IBA has since been stripped of its recognition as a sports governing body by the IOC.
Unlike transgender athletes like Thomas or Fallon Fox, Khelif never went through any type of transitioning. It would have almost certainly been completely illegal in her Muslim country of Algeria.
She probably falls into a category of people that are genotypically male but phenotypically female or something in between, often referred to as Androgen Insensitivity Syndrome. This was also the case with track athletes Caster Semenya and Stella Walsh, who both competed in the Olympics as women.
However, similar to Fallon Fox, who competed in MMA, the effect of Khelif’s hormonal differences are much more physically damaging to the opponent in a combat sport such as boxing, as was seen recently in the match against Carini of Italy.
This is causing an explosive debate to say the least. Another twist in the issue of who should be allowed to compete as women in sporting events.