British Cycling, the national governing body for the sport of cycling in Britain, is the latest body to bar transgender women from competing in the female category, reports The Guardian.

The organization said the decision was made after a nine-month review of the latest science, to “safeguard the fairness” of the sport.

New rules are in place which include the men’s division being replaced by an open category that will include transgender men, transgender women and non-binary individuals.

The female category for races under the guise of British Cycling, from grassroots to elite divisions, will be comprised only of racers who were born as females.