I think I am not the first stranger who asked them this question here, they seemed used to it
But IVF should really not be treated as a shameful treatment, it is just a different way to build family. I think on the west coast, it even has a COOL factor, because it has a technological component.
When I got pregnant, DH's boss at work (a big tech company) asked him point blank, IVF? DH didn't feel embarrassed and said yes, so the boss who has had 3 kids said, all of them are a result of IVF.