My friend who is 8 months pregnant had to get the train somewhere earlier this week. She walked down the whole aisle, obviously very visibly heavily pregnant, and not one person offered her a seat. After then standing around, eventually somebody - who was sitting on a window seat (!!!) - gave it up to her.
Visibly pregnant, in this very hot weather, and she said that everybody just chose to ignore her. Not only does this make me sad but also really angry.
Please, if you can and you see a pregnant woman struggling, give your seat to her without hesitation.