Female tennis players who undergo fertility treatment will no longer feel pressured to rush back to the court after the WTA ’s groundbreaking promise to protect their world rankings.

The move, called “groundbreaking” by 2017 U.S. Open champion Sloane Stephens, is aimed at players who take a break from the tour to undergo procedures like egg or embryo freezing.

The WTA, the governing body of women's tennis, is putting into place a rule that will protect a player's ranking should she choose to undergo a fertility procedure.