I know this might come across as precious but it's more of an awareness post. I've been guilty of asking invasive questions in the past too, it wasn't until I had struggles with conceiving my second that I realised.
I've been asked twice in the space of a few months if I'm pregnant. I'm nearly overweight according to BMI, carry weight on tummy and breasts anyway and also have a fibroid. Both times were in front of other people. I've laughed it off but it's embarrassing and invasive. So please if you think a woman is pregnant, don't risk asking. Don't draw attention to us and force us to talk about our bodies. She may have even suffered a recent loss which she is keeping private. I know people mean well most of the time but what seems like an innocent question can actually really hurt.
I guess I'd better work harder at losing the baby weight too from DC2. It's hard for me as I always was thin and it's not coming off easily this time.