I would keep the baby because no matter what the baby is, it is a living thing and it has the right to live like all of us do. And I would never kill such an innocent baby anyway even if it means that I would die.
I would freak out about the whole being a guy and not being able to get pregnant thing. I don't know if I'd keep it of not. I'd probably lose it anyway from having all the trauma and major panic attacks. I wouldn't even go to Isle Esme with him, I'm already engaged and I'd rather jump into a pool of razors than ever fuck Edward.
As long as I'd be monitored as closely as Bella was. I wouldn't at all mind ending up as a vampire, when the time comes. I probably wouldn't handle the pain as well as Bella did, though. I'd be crying and complaining the whole time, worrying everyone.
I'm just 13, but, even though its not born of fully formed, its still your baby and a living creature (i hate calling it a thing) So i would keep it. I mean who wouldn't? Unless they have no hart-, hart at all.