Well, this is a hard question to answer.. I would sign up for abortion.

He should "do the right thing". Not necessarily marry her, but they both need to take responsibility for their actions. If she wants him to or will let him be involved, he should be. In the pregnancy (i.e. Lamaze classes), the birth, the child's life, everything. They both need to decide whether or not to keep the baby. I am against abortion 100% not only because I think it is murder but because there are so many other options now. It is free to give a baby up for adoption anywhere in the U.S. All you have to do is sign a few papers. Abortions are not free unless the state you live in requires them to be. And, ask anyone who has ever had an abortion, they will both regret it for the rest of their lives. Another option is the Baby Safe Haven program. All you have to do is drop the baby off at any police station & they will take care of everything, no questions asked. Well, ok, they ask a couple of questions like what the baby's name is & things like that but you don't have to answer. If they decide to keep the baby & she wants him to be involved they need to decide how he will be involved. They could stay together for the sake of the baby (not necessarily get married, but that's an option as well), they could have joint custody, he could have partial custody with or without paying child support, he could just pay child support & never see the child, but what is important is that they decide together.