Sometimes, less is more really and in this case, they could have simply not mentioned it. Let the player answer it how they will or only bring it up when its strictly necessary.
How the "pregnancy" content was handled shows that there's a vast gulf between those that like that sorta content and the author; this isn't like their fault or anything but it's very hard to write things you fundamentally don't get. The fact they compared it to the earlier egg/slime stuff shows how they look at it and the way they write it, that ain't wrong but it's definitely the heterodox view on the matter and arguably a separate fetish.