micro chip in them. it measures head impact in which world rugby wants to do. but women in this area, it's been very well documented that women when they have a brain injury or a concussion and they do have different effects and symptoms to man. most of the studies that have been done of also centred around elite male athletes, particularly in rugby. this is an important time for world rugby to be able to gather data on women. it's really important study and great that the black ferns and the red roses will be wearing them both in matches and in training. them both in matches and in trainina. . ~ them both in matches and in trainina. ., ,, ,., them both in matches and in trainina. . ~' ., ., , training. thank you for “oining us. also let you t training. thank you for “oining us. also let you know _ training. thank you for “oining us. also let you know that _ training. thank you forjoining us. also let you know that bbc2 - training. thank you forjoining us. also let you know that bbc2 is i training. thank you forjoining us. i also let you know that bbq is where also let you know that bbc2 is where you can find those women's internationals over the coming few weeks. the alpine skier kelly gallagher has announced her retirement from the sport. with guide charlotte edwards, she won the super g competition in sochi in 2014 and became the first paralympian from team gb to win gold at a winter games. stephen watson reports. on the slopes kelly singing ? ?