User blog comment:Edward anthony masen cullen II/why cant two vampires reproduce/@comment-5527099-20120613042700

female vampires cannot reproduce due to the fact that they were frozen at what ever stage of development when they were bitten and transformed into a vampire, and also their uterus will not grow to accomendate a growing child due to they no longer can bare any children.

If a male vampire mates with a female human, then that male vampire is able to reproduce and it normally ends in tragity due to the fact that the child rips a part the mother in the process and kills them due to the loss blood. If the father of the child want to keep the mother of this child alive then he will have to do a emergency vampirism, venom injected straight into the heart.

That is why.