Breastfeeding is still very possible even after breast enlargement. It can happen if your doctor does not cut off your milk ducts. They can make an incision under your boobs to fix the problem. You do not need to worry about getting pregnant even if you have existing implants. Breastfeeding is safe because silicone cannot mix with breast milk. The only issue you may encounter is a slight inflammation on the chest. That said, women with implants that are larger than normal may have reduced milk production.