A study has shown that a dangerous game of "brinkmanship" between rival genes in mammals could help explain why many ...

A federal judge ruled Monday that two fathers cannot wear pink wristbands with two X’s — the symbol for female chromosomes — ...

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 ...

The Ohio House’s version of the two-year state budget only acknowledge two sexes, male and female, excluding transgender people and intersex people born with a mix of chromosomes or just one ...

A New Hampshire school district's ban on parents protesting a biological male playing has been upheld for now despite First Amendment claims from parents ...

Determining sex by chromosomes has also been highly contested ... “Preserving the integrity of competition in the female category is a fundamental principle of the sport of athletics ...

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 ...

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 ...