Crimes of the Future is a 1970 post-apocalyptic Cronenberg film. He gets rid of all "post-pubertal human females" via a plague brought on by modern cosmetics. We are led through the movie by a narrator, and we see how men deal with a world in which the only females are children. I'm not a fan of Cronenberg's films, and this one does not change my mind.
Googlevideo has it online:
Reviews are scarce, but Only the Cinema talks about it.