Please consult your doctor before beginning any exercise while pregnant. Each pregnancy is unique and should be treated so. If you are cleared to bounce while pregnant, we recommend that you keep bouncing at a MODERATE level.
We have specific workouts for pre-natal/post-natal women. I would recommend you watch the latest videos from Fayth's new series. Especially the first one - she explains what you can (and shouldn't) do on a bellicon while being pregnant: http://video.bellicon.com/videos/269
Here is the full Plan: http://video.bellicon.com/plans/7067