Over time there have been sports that have been tried to be included in the Olympics and some sports have been taken out. Ultimately, the International Olympics Committee is responsible for making the decisions about which sports will be included in the Olympics. Actually, it is a smaller committee within the IOC called the Olympic Program that makes the decision. There are certain criteria that must be met for a sport to be included. If the sport is included, it may be included for men and not for women because the criteria set is based on gender.
One criteria is that the sport in question must be practiced by over seventy-five countries for men. Women must be playing this sport in forty countries in order for the sport to be considered.