I was hugely pregnant for Halloween 2009 so I wore an evening gown, tiara, and a sash that said “Mrs. Da Pill”.
Everyone thought this Pregnancy Costume was pretty funny and original. I even won a costume contest that night with it!
Related costumes:
Beer Belly Hillbilly Costume Idea for a Pregnant Woman 
Homemade 1950’s Pregnant Housewife and Milkman Costume 
Extreme Pregnancy Costume with Extreme Baby Cramps 
Coolest Homemade Basketball Pregnancy Costume 
Pregnant Couple Costume: Basketball Player and Ball 
Twin Pregnancy Costume Two Peas in a Pod 
Busy Last-Minute Mom’s Pregnancy Costume 
Cool Homemade Pregnancy Costume for a Couple: Saturday Night Fever and the Morning After Disco Ball Belly
Looks like Miss Da Pill, as in Missed a pill. It’s also funnier.
Very clever! Def doing that this year!!!