This was recently discussed in a Dear Amy column in the Wash. Post--as a pregnant woman, do you mind being called glowing? So you mind if people comment on how you're showing (wow, that baby is really growing! Do they think it's twins?.....)
I never minded comments bc it was the first time I had an excuse for gaining weight!

It never bothered me--even when I wore a purple shirt and everyone (incl. DH) called me Barney

My sister on the other hand HATED any comments related to weight, shape, showing....she was devastated