Besides sexual abstinence would be great but before you can really get that through there should be lots of bad examples get of the air on tv or anything else. Those provoke them for doing that stuff because why is it bad someone famous does it also. Also you can't honestly expect teenagers when hormones are at there highest peek to have sexual abstinence, also for lot of them its important to fit in so they will have only sex sometimes because there friends already had it.
Well you could feel sorry for them, but honestly its only sad for those children if the parents are blaming them for there failure. When a parent starts to blame there child for getting pregnant its just not right because it was there own fault.