I don't look at abortion as a viable option to encourage or push. By default - I expect everyone to carry . . . it's an extra divergent path if she has an abortion. So he's tied to the default - not the divergent path. Anything else will encourage and favor abortion and that is exactly what we don't need in this country - though I support abortion being available and legal - I don't believe it should become any more of a choice that's taken than it is already.
Either way - her life can be permanently altered. Whether she has an abortion, gives a child up for adoption, or they have a relationship - whatever the case . . . pregnancy is risky business and regardless of the parenting status in the end - it can have extreme life altering results.
Now - this view of mine would be quite different if our government gave 100% adequate care to child and/or mother to where they wouldn't *need* his support to stay out of a homeless shelter. Then - maybe I'd have a different view because a child wouldn't be without purely for a lack of having a decent parent in their life.