I was about 7 months pregnant and worked in an environment where my bare belly (painted or not) could not be exposed but I wanted a costume that showed off my growing belly. I came up with an idea of being a Homemade Cat Who Swallowed the Fishbowl Pregnant Costume.
I simply wore black pants and a black shirt that I painted the fish bowl on the belly of. I wore cat ears, a tail and painted my face to reflect a cat. I think it would have been better if I would have painted the bowl bigger, but I painted it before measuring the size of my belly. Oops! Enjoy!