Nope. If that was the case, it would only be zombie fetus. It couldn't grow into a full on baby.
In dawn of the dead, she was 9 months pregnant when she got bit.
i'm thinking a breech birth, or if the cord is wrapped around the baby's neck where the baby dies in labour, causing it to reanimate shortly thereafter. I mean, the closest thing they have to a doctor is a vet and I doubt he knows how to diagnose a breech birth, and they don't have an ultrasound or any modern medical equipment to help them check on the health of the baby or to see if the cord is wrapped around the baby or not. there are a lot of complications that can occur during birth that could result in a deceased baby.
And the writer/director/creator said this is going to be like a drawn out Romero film, and that could be a nod to his works (plus I just don't see a way they can work them running around with a baby in tow into the story. nevermind the cliffhanger that would result with her giving birth and then someone noticing something is wrong and them cutting to black.
Edited by avelanch, 12 March 2012 - 09:55 AM.