Here's what's posted on the US FDA website ( http://www.fda.gov/fdac/features/895_brstfeed.html ):
"Silicone breast implants usually do not interfere with a woman's ability to nurse, but if the implants leak, there is some concern that the silicone may harm the baby. Some small studies have suggested a link between breast-feeding with implants and later development of problems with the child's esophagus. Further studies are needed in this area. But if a woman with implants wants to breast-feed, she should first discuss the potential benefits and risks with her child's doctor. "
Most breast implants are not silicone. I have saline(sp) If there is a leak when I start to breast feed, then it will not harm the child.