Strictly speaking, neither breast augmentation surgery nor breast reduction surgery are indications that a woman should not breastfeed. However, all types of breast surgery can interfere with milk production. In women who have received implants, the location of the implant and the type of incision used in the procedure will determine the extent, if any, to which the implant may affect breast milk production or nursing ability. In some cases, operations on a woman's breast may have involved incisions in the nipple area (such as surgeries for biopsies), and in these cases, the milk ducts may have been disrupted. Surgical disruption of milk ducts and scar tissue may also predispose women to plugged ducts, mastitis, or milk retention cysts during breastfeeding.