But that premature baby is in the same stage of development as the unborn fetus of the same age.... basically your stance is "out of sight, out of mind"
What people really want (most of the time) IMHO is convenience. They want to have all the sex they can and not own up to the responsibility of a child when they get pregnant. So they say "its a fetus" so they don't feel like a murderer when they have an abortion
I take you don't realize how awesome sex is?