An abortion can be legal in all the world because it has to be your own decision. Also there are many reasons to do that. The helping way i think is to create concience by organizations that teach how to prevent, consecuences and the most important thing is to know that it can goes to your dead.
I think is very difficult to be in this position, not only you as a mother even as a father too, also is more difficult when one of the two parts not accept, but the mother is who takes the last decision. Actually not only teenagers do that also adults woman too. There are organizations that people is agree and also desagree.
If i say is your own decision is because any religion, position can change your mind. Althought catholic church have been protested about abortion, maybe it excuse you if is an accident. Any organization or goverment can not have control to prevent because in some parts abortion is still illegal, exist places or clinics that you can do it.