My son attended a special ed school. A parent there shared with me that social workers had recommended sterilation for her daughter who is severely retarded. The girl is everyone's friend and a perfect target for anyone wanting easy sex. She would be incapable of handling pregnancy nevermind a child.
Eugenics?
The goal is to protect the girl from herself.
Her mother, by the way, decided against it for a variety of reasons.
Now she hopes that a pregnancy doesn't happen.