Ice hockey is a sport that is contested at the Winter Olympic Games. A men's ice hockey tournament has been held every Winter Olympics (starting in 1924); an ice hockey tournament was also held at the 1920 Summer Olympics. From 1920 to 1968, the Olympics also acted as the Ice Hockey World Championships, and the two events occurred concurrently. From 1920 until 1984, only amateur athletes were allowed to compete in the tournament, and players from the National Hockey League (NHL) were not allowed to compete. In 1970, after a disagreement over the definition of amateur players, Canada withdrew from the tournament and did not send a team to the 1972 or 1976 Winter Olympics. In 1987, the International Olympic Committee (IOC) decided to allow professional athletes to compete in the Olympics, and starting in 1998, the NHL allowed its players to participate. Women's ice hockey was added in 1992 and the first tournament was held at the 1998 Winter Olympics. Both events have been held at every Olympic Games since.
In women's hockey, Canadians Jayna Hefford and Hayley Wickenheiser hold the record for total medals (five), having won four gold and one silver. Their team mate Caroline Ouellette also won four gold medals. Four other athletes have won four medals: two Canadians - Becky Kellar and Jennifer Botterill with three gold and a silver - and three Americans - Angela Ruggiero, Jenny Potter (each with one gold, two silver and one bronze) and Julie Chu (three silver and one bronze).