The sport’s governing body announced on Thursday (March 23) that female athletes with differences in sexual development (DSD), resulting in high naturally occurring levels of testosterone, will need to reduce their amount of blood testosterone to below 2.5 nanomoles per litre - half of the previously accepted level of five nanomoles - for a minimum of 24 months.

The restriction on testosterone levels previously applied to events between 400 metres and a mile, which caused Mboma to move down to the shorter sprint, but as from March 31 all events will be included.

There is an interim ruling for athletes competing in events outside the previous restricted range whereby they will have to suppress testosterone levels below 2.5nmol/L for a minimum of six months before competing.

But while this would apply to Mboma, she will not have time to fulfil the requirement before this summer’s World Athletics Championships in Budapest, due to take place from August 19 to 27.

Mboma’s compatriot Masilingi, who finished fourth behind her at the Tokyo 2020 Olympics, is in the same situation.

Others affected by the new DSD regulations include South Africa's double 800m Olympic and world champion Caster Semenya and Burundi's Francine Niyonsaba, who was runner-up to Semenya in the Rio 2016 800m final.

Tjongarero said that the timing of the decision was unfair, given that athletes are preparing for major events such as the World Championships and the Paris 2024 Olympics,

"I believe these girls won't be able to run forever, and even if they take those remedies to reduce their level of testosterone, it will have side effects on their bodies, which will be bad in the long run," she said.

When asked about the Namibian Government's role in fighting the decision, Tjongarero said that a committee had been set up in the past with members from the Namibia National Olympic Committee (NNOC) and Athletics Namibia (AN) to fight the decision.

"When they announced the decision ahead of the Tokyo Olympics in 2021, we set up a committee with members from the NNOC and AN backed by us, consisting of lawyers and doctors, to fight the ruling," she said.

"The problem is that we are expected to avoid fighting such issues because it would be considered Government interference.

"We even advised the committee to reach out to Athletic South Africa and its Government to seek help on how they fought Caster Semenya's case, but we didn't receive any response.

"Now the issue has resurfaced, and unless I have to make another call, it will remain unresolved."

Mboma's coach Henk Botha told BBC Sport Africa it was a bit of a shock to receive it without any prior notice once again.

"Our team, however, remains positive and will work with a medical team to get Christine back on track as soon as possible," he said.

"We believe in her abilities and see this as an obstacle that can be overcome."