I know what you're thinking, but hear me out...
From the show we know that vampires can't have kids of their own like humans do. But we do know that even though they can't have their own biological children, the female vampires could be pregnant/surrogates as seen with Caroline.
So what I'm saying, say there is a human who is pregnant and is later turned. What would then happen to the baby? My assumption is that the mother (now vampire) will be able to continue the pregnancy like Caroline did and give birth. Since the baby and mother would share DNA and a blood connection, and now that the mother is a vampire would the baby be able to have vampire blood in its system and be able to become a vampire? With the cae of Hope, she has vamoire blood in her system and will become a full tribrid once she activates her vamp side. Could the same be for the baby in a way? Could there be vampire babies?