oh hun I am so sorry you have to deal with that!!!

some people just don't think AT ALL before they speak.
I had a similar situation with a co-worker years ago (except it wasn't about pregnancy/babies) and it got so bad I even went to our boss who never did anything anyway. I finally just stopped talking to her, never answered her comments or anything unless it was work-related. Apparently that made her cry because I was being "mean".

Can't please everybody.

I finally was promoted to another dept and things were better after that, but that was mainly bc we were no longer in the same area.