16 competitors from the 2012 Olympics are absent.
She wants to double at this summer's world championships.
She will be going for her fifth Olympics.
The selectors decided to stack the 1500m squad instead.
Mario Fraioli breaks down the top contenders in each race.
More big names join an already-stacked field.
She is putting off having a second child in order to focus on the Olympic marathon.
She had recently defeated Paula Radcliffe in the Bupa London 10,000m.
Paula Radcliffe made her long-awaited comeback.