Quoting Asher's mommy [Expecting :" Did they help move you guys along a little? Or at least help relieve any pain or anything? My yoga instructor told me to get one, but I don't want to spend the money for nothing. "
I bounced on one for a week before my waters breaking and going into labour on my due date. It helped him turn from the back to back position (thats why i was told to bounce on one ALOT to move him) and it was also the comfiest thing i had sat on all pregnancy! it was great.
and it really helped during contractions.