Breast implants

I always had small breasts until I became overweight. I am now going on a medically supervised diet. I know that I am ready to really lose the weight and keep it off. The only trouble is that I am only a size "B" cup now. When I lose the weight, I am sure to be an "A," or even an "AA." So, I have been considering the possibility of breast implants. Can you tell me some of the repercussions of breast implants? Can you breast-feed later? What happens during pregnancy? What are the health risks? Well, any information you have about the topic would be helpful. Thanks!