During Padmé's funeral in Episode III she still appears to be very pregnant as her casket is drawn through the street, even though she had already given birth to twins before she died. You could perhaps make the argument that it is remaining baby weight, but judging from how thin she was before giving birth (to twins, no less) there wouldn't seem to be enough baby weight to make her still appear just as pregnant as before.
So that lead me to think that she was purposely made to still appear pregnant for her funeral, so that the Emperor (and/or Vader) wouldn't suspect that there were any little Skywalkers running around. There's no overt mention of this sort of ruse in the movie. Is there any other source that makes reference to Padmé being made to still appear pregnant for her funeral?