NANJING, China — World Athletics President Sebastian Coe said Tuesday that the track and field’s governing body has approved the introduction of cheek swabs and dry blood-spot tests for female athletes in order to maintain “the integrity of competition.”

The planned changes include reinstating a version of chromosome testing that was discontinued in the 1990s, requiring athletes who compete in the female category to submit to a cheek swab or dry blood-spot test for the presence of a…