For most women... the first few months of pregnancy are the worst. You feel like crap - nauseated, exhausted, dizzy, etc. That would be the time when you need an open seat on public transportation the most!! Unfortunately - people don't give up their seats for tired/queasy looking women... only enormously pregnant women with heavy bellies!
Lucky for me, my commute on BART these last couple of months have been pretty uneventful. I've been feeling pretty great pregnancy-symptom-wise (no morning sickness, etc) just pretty exhausted by the end of the day. I almost always get a seat on BART in the morning (if I don't - I just wait for the next train). And on the way home - I ride the train backwards, deeper in to SF - so that I can on a less crowded train and find a seat. But BART has been so crowded lately (with the higher gas prices) that some people who NEED a seat aren't getting one.
And so it was that I found myself last week... siting comfortably in my seat... settling in for my 40 min ride... when a VERY pregnant women got on the train. I waited... waited... waited... no one stood up to give her their seat. And so... *I* - a pregnant women myself - stood to give up and gave my seat to someone who needed it just a little bit more. I found it a very humorous and ironic moment.
I hope Karma is good to me as the months progress... my belly grows larger... and BART gets more crowed.