Board Thread:Lore Discussion/@comment-5701011-20140725171950/@comment-12599067-20140725204616

Undead isn't quite the right term. Vampires still have beating hearts, as shown by Serana when her wrists were cut to open the portal to the Soul Cairn. Lord Lovidicus was a vampire long before Agronak's birth, as stated by his journal. Thus, vampires have fully functioning organs or at the very least can have children with mortals and probably one another, although it would seem that a child of mixed mortal-vampiric parentage would not be a vampire, if their mother was mortal. Going by the notion of Racial Phylogeny, I would imagine that a child of mixed parentage with a vampiric mother would be a vampire, but that's just speculation.