According to the Los Angelos Times:
Between 1909 and 1964, more than 20,000 people in California were 
robbed of their reproductive abilities through a state program of forced
 sterilization. Under the misleading guise of "race betterment," doctors
 at California's state hospitals sterilized those who were considered 
"unfit to propagate."
The origins of California's 
forced-sterilization program lie in the misnamed eugenics movement of 
the early 20th century. The term means "good breeding" and stemmed from 
efforts to improve plant and livestock breeds. But those who believed 
that "degenerates" and the "feeble-minded" should be prevented from 
having child- ren launched campaigns for state laws to permit the 
sterilization of people with such deficiencies.
 In 1907, Indiana became the first state to pass a forced-sterilization 
law, and California followed suit in 1909. Thirty states ultimately 
enacted such laws, and some 64,000 people -- most of them poor, young 
women -- were subjected to the surgeon's knife without their consent.