Dr. Schulze says that you can do the Incurables Program while pregnant or nursing. I would say you don't have to stop. Dr. Schulze says that pregnant or nursing women may want to back off a little on the intensity. There is nothing in the Incurables Program that will harm your child through your breast milk. I would suggest keeping an extra close eye on your child to see if off flavors are passing through your milk with some of the strong herbs like chaparral.
Dr. Schulze has a couple of tapes with Questions and Answers. He discusses this issue on I believe the second tape.