Board Thread:General Discussion/@comment-24768935-20140624042149/@comment-24851346-20140704224121

Well it seems like all the Mamano are somewhat infertile (which they make up for with plentiful rape/love-making/what-have-you), but some Mamano have additional means to augment their population than the traditional.

Parasites like Ropers are probably smaller since they are parasites, and need human hosts to increase the populations.

Wereas lycanthropes and various other monsters can both give birth to monsters, and infect humans.

As for zombies, there are an unlimited number of dead, and they don't distinguish betweeen male and female corpses.

However, I would make the argument for the succubi, since they consist of the bulk of the Demon Lords army, (or so I believe) and consist of numerous subspecies, and most humans while infected with demonic energy turn into succubi.