"Everyone is waiting for the B-sample analysis," Tommy Forsgren, who works with doping cases at the Swedish Sports Confederation, tells Radio Sweden.
The news broke last night that the Swedish athlete had tested positive for doping during a test in Ethiopia last month. The Ethiopian-born runner won gold at the 2013 World Championships in Moscow and at the 2014 World Indoor Championships in Sopot. Now, she has tested positive for the substance meldonium, which was added to the World Anti-Doping Agency's list of banned substances this year as a metabolic modulator.
The International Association of Athletics has suspended Aregawi during the investigation, and the Swedish Olympic Committee has moved to take away financial backing for her. She is now unlikely to compete in Rio.
Aregawi claims she is innocent and wants another test - an analysis of the so-called B-sample.
Forsgren says that it is important to remember that no final decision has been made yet regarding Arewagi's suspension, but he also believes it is unlikely the B-sample will reveal negative results, since both the A and B samples come from the same urine specimen.