A group of doctors, including an endocrinologist, a gynaecologist, an internal medicine expert, an expert on gender and a psychologist, have started the testing procedure but it is uncertain when the results will be known.
Weiss said testing was being done in Berlin and South Africa but admitted it was a complex issue.
"At this stage, it's confusing," he said. "Personally I have no clue what's going on. I rely on and trust our doctors. We would have preferred not to have had a controversy."
After the race, Meadows said: "It's up to the IAAF to sort it out. You can't do anything about who is out there.
"There's just eight people on the track and you just have to make sure you're in the first three to get a medal."
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