Doha (AFP)

Nigeria's Aminatou Seyni, the 400m specialist with the third fastest time of the season, was unable to line up at the Doha World Championships because of the new regulation on hyperandrogenic athletes. she said Monday.

"We will try to arrange between my manager and the IAAF (the International Federation), but yes I was forbidden to participate in the 400m," said Seyni in the mixed zone, after having run the 200m series , a distance where it is less efficient.

"I am obliged, it is because of the new rules of the IAAF, as for Caster Semenya, I am obliged to do like it".

Since May 8th, an IAAF regulation requires some athletes with a difference in sexual development (DSD) to undergo a treatment to lower their testosterone levels, in order to compete on distances from the 400m to the mile ( 1.609 m).

The IAAF believes that these athletes have a physiological advantage "unfair" over others.

Controversial, this regulation was attacked by the double 800m Olympic champion Caster Semenya, who refuses to take medicine and can not defend his world title in Doha.

The Swiss Supreme Court has to rule on South Africa's appeal on a decision of the Court of Arbitration for Sport (CAS), which ruled in favor of the IAAF on 3 June.

Third best performer of the year over 400m, Aminatou Seyni (22) could consider a distance medal in Doha.

The Nigerian, who trains in France part of the year with 800m runner Benoît Noelie Yarigo, won her 200m series in 22 sec 58, setting a new personal best.

"I am happy to be qualified for the semi-finals (which will take place on Tuesday), I will do everything to qualify in the final," she said.

© 2019 AFP