For some time the Contraceptive Implant has been the most used method here in Denmark when underaged girls are caught having sex with boys of their own age. There is no pregnancy for three years and all the social workers recommend this until further therapy can solve the problem if possible at all. I bought one for my daughter too regardless of the fact that she is not on the market (There is no interest at all), but tides can turn so easy. If she does as everyone else she will be 17,5 years before the first intercourse is done (As parent I would like not to even think about that). How used are they in the States?