I was watching a tv show last night (ER) and they diagnosed a woman with cancer (kidney? liver? something hereditary- her mother had died of it) and she was 18w pregnant, she opted to have a one op removing the tumor and a termination at the same time so she could have chemo. During the operation they discovered that it was stage 4- 2% chance of living past a few months (long enough to gestate to viability) so she was going to die anyway. The husband couldn't bring himself to override her wishes for the termination, so she lost the baby and died anyway (guessing she died, the storyline ended there).
Anyway my point is is if I was going to die soon I wouldn't pick me, I would pick the baby.