You may not have been expecting any males to check in on this topic, but I just saw a news segment on TV about how doctors are more likely to encourage exercise during pregnancy than they were in the past.
In my opinion, though, the rise and fall of the waltz and the hip action of other dances wouldn't be conducive to your current situation.
But here's something to look forward to: This particular news segment also focused on how women who, prior to their pregnancy, were active in some form of sport or recreation, found that they came back stronger after the birth of their child. The premise was that the endurance and the strength built up over carrying and delivering a child would equate to a stronger body and better performance.
A woman who was rather sedentary prior to becoming pregnant obviously wouldn't benefit from this theory. But a dancer sure would.
You'll be back at it, and probably better than ever, soon enough.

NOw that is very hopeful information. At the moment the pregnancy hormones have my ligaments so loose that one shoulder and both hips slip in and out of their sockets--a bit painful at times. But the thought that all the weight of the baby could be strengthening other aspects is welcome. I have noticed that stairs are not as difficult as I expected so perhaps going up and down to the bedrooms while pregnant has been a good thing for the legs.

Belle, I have been sneaking some arm exercises in, working on how I hold my hand when moving my arms in and out--doing it seated so as to limit my urge to move other ways. I've a DVD on Body Awareness and the woman dancer in it has the most graceful way of moving her hands so I've let myself do a bit of that; and a bit of the arm movements from belly dance too.

It is technically cheating on the "sedentary" orders but I suspect at least some of that order was given because the doctor noted that I am rather driven and he felt I needed to slow down.

I only have to survive through the end of September or early October, but it will likely be January or February before I get the new baby regimented enough to free me up for dance classes again. Once she can be put in a back pack I'll be much better off--backpack doesn't get in the way of ballroom!!