Caster Semenya was born with male chromosomes (XY) and testes.
Save Women's Sports believes that this should disqualify Semenya from competing against women.
2016 Olympics - Semenya (on right)
"Semenya, the two-time Olympic 800m champion, said she signed with a South African club with the intent to play competitive matches in 2020. She played the sport in her youth before becoming a world champion in 2009 at age 18. "
Earlier Swiss Court Ruling is overturned. Caster Semenya is denied entry at world championships.
Quillette - A Victory for Female Athletes Everywhere