Congrats on your pregnancy!

Re the exercise, I think I was told not to do anything that overheats you - so if you're not fit and getting pretty hot & sweaty... it can overheat bub too. I think there's also guidelines about heart rate as well if you want to get technical. If I were you I'd be sticking to exercise that you're used to doing. So if you usually run every day, you could probably keep running. But if you don't do that level of exercise, I'd recommend things like going for a walk or a swim. They're great for your fitness, will help your energy levels and are lower risk.

I've seen some preggie exercise DVD's, but heard various contradictory reviews as to whether they're any good or not. I know with things like yoga, there are some poses to avoid - so if in any doubt, I'd double check with your doctors.