Ontario Prader-Willi Syndrome Association

The Ontario Prader-Willi Syndrome Association (OPWSA) is a non-profit, charity which was established in 1982. Their mission is to enhance the quality of life for individuals with Prader-Willi Syndrome. OPWSA has a membership of 1000, including individuals with PWS, their families and interested professionals. This website was created to be a source of information for those interested in and affected by Prader-Willi Syndrome.