Logical Errors In Movies That Should Have Been Obvious To Us
Sometimes it's the little things that make a big difference. After learning about these logical errors, you'll look at the movies differently.

Why Did it Take Edward so Long to Realize Bella is Pregnant?
How did Bella's pregnancy go unnoticed by Edward for so long?
Much of the film is concerned with showing the unusual strengths of the vampire family. So it is illogical that Edward only realizes Bella's pregnancy after she does. Reddit user lilbearcat19 writes that:
"Edward Cullen has TWO. TWO. Medical degrees. He has the sense of smell of a vampire. Bella has all the classic symptoms of pregnancy, including, but not in any particular order: hunger pangs, she sleeps more ...
So I'm supposed to believe that Bella noticed her pregnancy by her morning sickness before Edward noticed that her hormones smelled different, or that she exhibited other strange behaviors? Not to mention that if Renesmée was already moving, etc., she should have some form of heartbeat. Edward can hear Bella's heartbeat, like there's a drum in the room, couldn't he hear Renesmée's?"
[lilbearcat19 via Reddit]
And it doesn't end there: