Maybe adoption could have been a mentally difficult thing to do, but there is nothing physical involved in it. Your ideas about abortion are also way off. It is much, much more dangerous to carry a pregnancy t term and deliver a child, for a woman at any age but more so for a young teen, than it is to have a first trimester abortion. Do you really think your mother would have been pushing you to have an abortion if there were any risks associated with it? I don't. She sounds like she loves you more than anything and only wanted the best for you.
futureshock you are missing LSS145's point. When her mother gave her "the talk," she said she would support her when she became sexually active, to get birth control to protect against pregnancy and disease. Then when she did become sexually active, her mother went back on her word. You're focusing on what happened after that, but that switch from support to denial is a huge betrayal.
If teenagers can't rely on their parents to help protect them from pregnancy and disease in the first place, I can see why the teenagers would not be interested in their parents' opinions and preferences after the fact. Even if the parents love them, and even though teenagers are notoriously capricious.
I don't want my kids having sex in high school either, but if they are going to be sexually active, I'd rather they were using birth control than getting pregnant.