whereas waiting after pregnancy for your breasts to settle makes sense, waiting before a BBL is not necessary. The fat harvested is easier to manage when you're heavier, not thinner. find a board certified plastic surgeon, who's done a ton of BBLs, and has privileges to do it at a local hospital and you'll be in good hands. all surgeries carry risks, so choose your surgeon wisely and don't worry too much about the time elapsed. good luck, and enjoy your new shape.
I think 6 months is ok as long as you have gotten down to your goal weight, and you are no longer breast feeding. Best to be seen in person.
The truth is it probably does not matter. If you are to prepregnancy weight, the results should be the same.
Kenneth Hughes, MD
Los Angeles, CA