World Athletics and FIFA are the latest governing bodies considering a ban on transgender women from competing in female events.
World swimming's governing body FINA has barred transgender athletes from participating in women's events if they've undergone male puberty.
There will be no transgender players in women's international rugby league matches - including this year's World Cup - thanks to a similar ban by the International Rugby League.
Closer to home, all eyes are on the National Rugby League to see if they follow suit.
Transgender academic and former athlete Joanna Harper spoke to Susie Ferguson.
