How much milk you can produce depends on how your surgery was done, where your incisions are, and the reasons for your surgery. Women who have had incisions in the fold under the breasts are less likely to have problems making milk than women who have had incisions around or across the areola, which can cut into milk ducts and nerves. Women who have had breast implants usually breastfeed successfully. If you ever had surgery on your breasts for any reason, talk with a lactation consultant. If you are planning breast surgery, talk with your surgeon about ways he or she can preserve as much of the breast tissue and milk ducts as possible.
This answer is based on source information from the National Women's Health Information Center.