The International Olympic Committee have been accused of "buck passing" after new guidelines removed testosterone limits for transgender or intersex athletes and left each sport to decide its own eligibility rules.
Most sports currently follow guidelines which were drawn up by the IOC in 2015, which allowed trans women to compete in female sport if their testosterone levels are below 10 nmol/L per litre, but that advice has now been scrapped.
In what some campaigners have called a "victory", the IOC are now guiding against testing and emphasised the potentially "serious adverse" health impacts of requiring women to modify their hormone levels.
The IOC have instead advised sports to individually consider "disproportionate advantage, which needs therefore to be mitigated" and suggested that there could be different rules even within different disciplines of the same sport. They have, however, set no timeline on when sports should implement new policies.
The lawyer Katherine Deves, who formed the Save Women's Sports Australasia group, immediately accused the IOC of "muddled logic" and said that it had "failed to take a strong position to protect women".