Ok, that's better. Well, some people say that teen sex is inevitable, but that's not exactly true. AT least half of kids in high school are NOT having sex. But for the ones that are sexually active, even the ones using birth control, pregnancies are going to happen.
I think abortion is a good thing to have as a legal right for any teen who does NOT want to go through a pregnancy and childbirth. many teens have plans for college and beyond, and parenthood is not something they want to be involved with until they are older and more financially secure.
Many teens with unwanted pregnancies have the child. They have their own set of hurdles to jump by being teen parents.
An interesting and controversial group of pregnant teens are those who got pregnant on purpose. Many don't admit it, but many do.
I hope that helps you as far as an outline goes.