Now seriously, nothing beats parents getting involved in the life of young teens, a more of less proper guidance toward life and human values, and if the "unthinkable" happens, to know that adoption is always a better choice.
I am not against contraceptives, it is just not the "solution", because there's not solution to bad judgment and irresponsibility, wrong values, and society fast lane to instant gratification, specially, in the glamor of sexuality.
Please don't tell me that is the human race you're talking about.