From 1907-1966 there were 60,000 forced sterilizations performed in the United States. Indiana was the first state to pass a law requiring institutions to staff physicians to perform forced sterilization on people with disabilities whom, at the time, were called imbecile's and idiots. California was the second. In 1914 Harry Laughlin wrote the Model Eugenic Sterilization Law in a way that made it constitutional. This was credited for the wide spread use of forced sterilization.
For more educational resources see Museum of disAbility History.