We started this scary pregnant zombie DIY costume by blowing up a large balloon and putting paper mache around the balloon… letting the balloon dry for about a week. I cut out a hole in the belly and sprayed in spray Styrofoam into the belly and let it dry… this gives the appearance of guts. After this dried I spray painted the guts and outer part of the belly red to look like blood.
I bought the rest of the costume at abilities unlimited stores… a nightgown, robe, house slippers and baby. I found the brains and the rats at a local Halloween store and the umbilical cord was rubber tubing found at Lowes. The guts inside the belly is made out of pantyhose filled with paper towels and soaked in jello. Add some awesome zombie makeup and you have an awesome homemade cheap costume!