Vivian Cheruiyot expecting first child, aims to return in 2014

Vivian Cheruiyot is not defending her world 5,000 and 10,000 metres gold medals in Moscow in August because she is expecting her first child, the Kenyan said in a statement.

The 29-year-old, who won both races at the 2011 world athletics championships in Daegu, South Korea, took silver and bronze in the 5,000 and 10,000 at last year's London Olympics.