hyzmarca, I was thinking about the events in Superman II after I wrote my entry. Since Supes and Lois had sex when Supes was human, if Lois became pregnant, wouldn't that mean the kid would be human?
Supers was never human. The red sunlight chamber just suppressed his powers, it didn't change his DNA.
Supes wouldn't have knocked boots with Lois after, because at that point he already made a commitment to be Superman first and Clark second, to give up on the possibility of simple human happiness for the sake of the world. That's the whole reason he erased her memories. And there's also the Man of Steel, Woman of Kleenex problem, in which his orgasm is likely to kill her. There is a reason they didn't have sex until after his powers were suppressed.