Although these badges are more common for London commuters I'm sure you can all relate...
I started my pregnancy naively thinking that commuters always notice a badge and everyone would be gracious enough to offer their seat to a pregnant woman. I think whether you are suffering morning sickness at 8 weeks or nearly due at 36 weeks and tired, you are still pregnant and need a seat. Although it's not a right, it's just kindness.
Having been on public transport for the past four weeks with my badge and having a 90 min commute, I have been offered a seat very few times, women pushed past to grab the last seat, people stare at their phones, pretend to be asleep or just blatantly stare at me. It doesn't matter what type of person, young people, tourists, and the many Polish and Indian people that travel my tubeline the lack of kindness has shocked me no end. I have lost faith in humankind, people are just too selfish now.