Exercise and pregnancy

Body: 

I just wanted to know if any of the exercises in the DVD are not good to do while pregnant? And what exercises has everyone found to be helpful for cystocele while pregnant?

DONT do the firebreathing or nauli

I am currently 25 weeks pg and all I'm doing (aside from trying my hardest to stay in posture) is walking with the arm flapping. I think about doing some plies now and then but I'm too tired/lazy.