But what an enticing offer: "Listen, nobody likes abortion. Nobody wants their daughters impregnated by a rapist, or anyone else, until she's ready. The school-based health clinic will provide free immunizations against sperm. It's just a safety precaution, mind you, and we're not condoning sexual activity one way or the other. During and after college, the immunization is renewed free of charge. If she'd like the immunization reversed, she just needs to file a statement of intent with the local health department and provide adequate documentation that she's financially, physically, and psychologically prepared to have a child. That's all she has to do. No unwanted babies. No abortions. Deal?"
Considering the immense changes that have occurred in the last thirty years, I don't think this scenario's too far off the mark.