Was discussing this very thing with a friend. She was telling me her DN is 7 months pregnant, works in the city and has to stand up most of the time. No one (man or woman) offers her a seat.
We were travelling on the train to meet another friend for lunch. We are well dressed "ladies of a certain age".
Two young lovely well dressed young men immediately got up and offered us their seats. We accepted because it would have been mean spirited not to.
We didn't want to take their seats because we were on a day off work going to a leisurely lunch while they were on their way to a long day at work.
I never expect anyone to stand for me on trains. Luckily I have a 10 minute drive to work most of the time.
Most of the men and women racing to trains in the morning have already done a few hours hard work already. Getting DC ready for day care, school etc. Should one really be expected to stand up for the other?
Yes, we all teach our DC to have manners and stand for the weak, sick, frail and elderly. Unfortunately, pregnancy isn't any of these.
I would always stand for a pregnant woman but I understand if someone else doesn't.