"CAS left the decision for all parties to release their witness list to the parties involved. This was agreed."

The IAAF have named Dr Angelica Hirschberg, Professor of Obstetrics and Gynecology at the Karolinska Institutet, Stockholm, as a witness, along with David Handelsman, Professor of Reproductive Endocrinology and Andrology at the University of Sydney, and physicist Joanna Harper.

The other two witnesses will be Doriane Coleman, a Professor of Law at Duke Law School, and Richard Auchus, a former Professor of pharmacology at the University of Michigan.

The IAAF regulations stipulate that women with elevated testosterone take medication to reduce their level before being allowed to compete, but only in the middle-distance events of between 400- and 1500-metres where it is claimed the advantage is most felt.

'FAIR COMPETITION'

IAAF President Sebastian Coe told reporters on Monday that the regulations are aimed at levelling the field between hyperandrogenic athletes and those with normal levels of testosterone.

"The core value for the IAAF is the empowerment of girls and women through athletics. The regulations that we are introducing are there to protect the sanctity of fair and open competition," he said.

The IAAF's previous attempts to regulate testosterone in female athletes fell foul of a CAS ruling in 2015 following an appeal on behalf of Indian Dutee Chand, who had been banned from competing because of her high levels.

CAS claimed in their judgement that the IAAF had not provided sufficient evidence that hyperandrogenic athletes gained a significant advantage due to their testosterone count.

The global governing body now claims to have that evidence, but it is believed Semenya will bring experts to prove holes in the IAAF research during the hearing that is scheduled for five days.

A verdict could take up to a month to be reached, according to CAS.

Reuters