When my daughter was going through her decision, this pamphlet helped us a lot to consider the realities of both choices.
My daughter decided to parent before the birth of her child. Her son is now four and she is very happy with her decision. Her dad and I provide a lot of support (not so much financially, but helping with day care). My point is that, if you are considering parenting, before birth, you must have a concrete plan in place to provide for your child. Good luck!!
"What you should KNOW if you're considering adoption for your baby"
http://www.cubirthparents.org/edd/index.php?id=1