Right after we have a discussion as to what happens to immature girl's body during pregnancy and childbirth, and how it is entirely likely that their bodies will be badly screwed up, that they can never have another child.
Your bones soften and spread, your abdominal wall muscles are destroyed, and your uterus goes from the size of a teacup to something will hold a 7 lb. baby. Just at the time when a young girl is experiencing the greatest growth spurt in her entire life, and adjusting to adult hormones, you throw in the complete physical and mental onslaught of pregnancy hormones.
Every woman I know who has had an abortion, has said that it was the right thing to do at the time, but they never wanted to do it again. Having a child ties you to someone for the rest of your life, and not just the child, but their father too.