The guy was one.  The world is full of them.  

FWIW I'm about your height and non-pregnancy weight.  Like you, I carried out front for each pregnancy.  I was well over 200 lbs each pregancy and heard that a lot.  My second child was actually the size of very healthy twins who wouldn't need to go to the NICU so I suppose it was warranted to some extent but it's still freakin rude.