[@Hillan] And yet she is dead nonetheless, where characters such as Blackbeard and Nami are not. Ultimately, the dead have failed Survival of the Fittest by not being fit enough to survive in some way, in Rogue's case the strain of a highly-overdue childbirth. You've also not described the parameters of what kills a woman with a highly-overdue baby; is it resource strain, internal damage from holding the ever-growing child for too long, or is the cause of death actually damage resulting from the birth itself? Because if it's the last one, Rogue probably isn't that special as far as physical statistics go, and certainly not by One Piece's standards.