Women's Rugby World Cup players to wear mouthguards that light up on impact
The smart gumshields will send an alert to the match-day doctor warning of possible concussions, while referees will be advised to stop play upon seeing the red flash.
Tomas Kauer - News Moderator 
The smart gumshields will send an alert to the match-day doctor warning of possible concussions, while referees will be advised to stop play upon seeing the red flash.
