I would concur with my colleagues that although "anything is possible", it is not likely that a breast augmentation would affect your ability to breast feed.  There are studies in the Obstetrical literature that suggest that post augmentation breast feeding success is lower however.  In addition, it is thought that use of the incision along the nipple may be associated with a higher risk of inability to breast feed in comparison to other incision locations such as those in the breast fold.

Breast Augmentation