I work in an all-male office, although I'm sure this isn't restricted to mine..
Our horrifically creepy technician (who comments on the way I look, my personal life, etc at the best of times, despite my one word answers) told me this morning that "that beer belly's really getting out of hand now," (the latest in a long line of 'jokes' about it) and now another of them just cornered me in the lift and told me I've "ballooned" recently, and was it twins. Haha.
I get it. I'm fat suddenly. It's because I'm pregnant, so why is this a shock to people - it's only going to get worse for 3 months. How far can I justify GBH based on hormones? 
What are your best smackdowns for berks like these? Thinking of putting a comments box on my desk with a sign saying "Idiot pregnancy comments in here please, not to my face."