From where I stand, the possible negatives far outweigh the positives. It's not something I would do to myself. I do see having some excess skin removed in a few years (from pregnancy) if it doesn't shrink back into place and possibly my breasts lifted, and I'm not opposed to some more "minor" adjustments like skin treatments, but the thought of liposuction makes me very uneasy. For those who have it done or wish to have it done, more power!
