Hi Leah,
I found out about the Pregnastics classes from a hospital brochure the midwife gave me at my first hospital appt.
And the physiotherapy dept continues to hold classes for mums after the birth - to help get them back in shape... only I can't go to those ones because now it is too hard with Aidyn and the pram to get public transport all the way there...
I went to the Royal Brisbane Womens Hospital. I don't know if they are one of the only ones that hold classes like that or not?
But best of luck finding something similar for yourself, because it really is fun! Even if there are no classes held near you, I'm pretty sure you can get excerise videos/dvd's for pregnant women?...