Women's National Basketball Association

The Women's National Basketball Association (WNBA) is an American professional basketball league for women. The league first held games in June 1997. The WNBA has thirteen teams across the United States. 
The games have two 20-minute halves with a 30-second shot clock. Each team has eleven players on it. The ball used for the games is one inch smaller than the ball used in the National Basketball Association (the professional basketball league for men in the United States).