Is pregnancy a reason to be medically excused from jury duty?

So I posted in another room asking for people's experiences with being called for jury duty while pregnant. I'll be a little over halfway through my 3rd trimester on the date I've been called and I was going to ask the court if I should or could be excused. Some have responded that they were excused for pregnancy or pregnancy related issues while others didn't feel it was a legitimate reason to be excused.

So I thought this would be a good topic for debate. Is pregnancy a legitimate reason to be excused from jury duty? Is there a cutoff date for pregnant women to be expected to serve? Or any other circumstances to be considered?