You seem to be prejudging the situation. While the circumstances are not ideal, the outcome is not a foregone conclusion.
I know a young woman who got pregnant while in high school and was inspired by the circumstances to be the best that she could be. The boyfriend wanted her to have an abortion and refused permission to put the baby up for adoption. So, she made the best of a very bad situation, with absolutely no family help (her parents had recently divorced and her mother was diagnosed as bi-polar). By the time she was twenty one, she had a job and had built her own self help house. She is now married, the mother of three and living in their second home.
She didn’t need the boyfriends permission to put the baby up for adoption. Its good she kept it, though.