Talk:Echidna/@comment-78.20.131.40-20150528092724/@comment-4991168-20160313124102

Lilims, some artificial monsters, and probably several monsters ranked incredibly high (like Baphomets, Pharaohs maybe the Apophis) are likely off the table, but other than that... Zombie monstergirls can birth other zombie monstergirls, so undead are probably okay, nothing says a doppelganger can't be born, Alps and Bicorns are specific cases (but, if/when monsters start birthing males, Alps will likely become a possible outcome as well) of changed beings of other types, and a Dhampir is definitely possible, just somewhat of a weird instance.

My theory is that an Echidna carries a birth to term differently depending on the type of a monster it'll be.