Watching it now.
Lori's pissed at Rick?! I swear, if she dies by being torn apart by a zombie baby inside her, she earned that.
lol... I actually had a similar thought about the zombie virus and if she miscarries would the fetus(depending on term) try to eat its' way out.
Anyway as to Rick... I really think he's a piss-poor leader. Seriously? Dude is told that if ANY LIVING PERSON dies they will come back as a zombie and endanger the group and he never tells anyone? MAYBE he's telling the truth when he says he didn't believe it, but the danger of not telling anyone FAR EXCEEDS the benefits of keeping it hidden.
This would be how I would think about if I was a character... So I turn into a zombie if i die? Umm...Big f'in deal...99% of us are going to be killed BY A FRIGGIN ZOMBIE! So even if we weren't infected we'd have turned into one the way we think everyone is turned into a zombie.