Yep, I was going to say that but you beat me to it. Thanks for the lead in, though.
"One of the most prominent feminists to champion the eugenic agenda was Margaret Sanger, the leader of the American birth control movement and founder of Planned Parenthood. Sanger saw birth control as a means to prevent unwanted children from being born into a disadvantaged life, and incorporated the language of eugenics to advance the movement. Sanger also sought to discourage the reproduction of persons who, it was believed, would pass on mental disease or serious physical defects. In these cases, she approved of the use of sterilization." Yes, that's from Wikipedia but it checks out.