I suspect that the Algerian may be one of those small number of people who's biology isn't clear, like that runner who looks female, was raised female but has internal undescended testes that blurs the line.
It will be interesting to see what happens, apparently her next opponent has already come out and said she doesn't care if she's a man or woman, she'll fight her.
Just for interest, her Wiki page n extract,
https://en.wikipedia.org/wiki/Imane_Khelif
You have to feel for her, it's not like this is her fault. Imagine being raised a girl, playing sport as a girl, then as the result of some test, being banned from your sport and having people call you a Man and a cheat.Khelif grew up in a rural village in Tiaret Province, in northwestern Algeria.[3] She originally played football before switching to boxing. In her early years, she had to commute to a neighboring village to attend training sessions, and sold scrap metal to afford the bus fare.[4] She mentioned that her father initially did not allow her to participate in sports because "he did not approve of girls boxing".[