If you are pregnant this Halloween, get a big box, like one that a TV or microwave comes in, cut holes for your head, and arms leaving the bottom open so you can have lots of room for your legs. Make sure to get one that will go below your belly.
Check out these photos.
My daughter was pregnant at Halloween time so they made a "Bun in the Oven" costume. Her husband was outfitted with a white apron and chef's hat and carried a mixing bowl and wooden spoon.