Dear Ms.Formentera 1995, Thank you for your questions. Nothing substitutes for a personal evaluation, a review of your medical history/medications and a face to face discussion of your options. Unfortunately with out a exam of your tissues I can can only comment based solely your photos. However, hopefully you will find them helpful. Depending on your model photos we usually try to perform the grafting in one setting. Occasionally if there is fat absorption, your skin can't stretch to accomadate the amount fat desired or you decided to go larger a secondary procedure can be done. Remember it's always easier to add than have to go back and take away.Fat grafting is technique sensitive and is dependent on several variables, including but not limited to:a) harvestb) purification c) injection techniques d) areas injectede) genetics Thus a small amount of fat can go along way or in contrast a large amount may not give you the desird apperrance.Your potential donor areas include abdomen, flanks, inner thighs, back and armsIn addition to injecting fat into your buttock the buttock usually needs to be liposculped in some areas.I suggest the following:1)bring some photos of models buttock you desire.2)make several consultative appointments with Plastic Surgeons who are experienced and Certified by the American Board of Plastic Surgery. In addition ideally they are members of the American Society for Aesthetic Plastic Surgery (denoting by membership as having met additional criteria and a focus on Cosmetic Plastic Surgery). I wish you my best and success, R. A. Hardesty, MD, FACSDiplomate and Certified by the Am. Bd. of Plastic Surgerywwwimagineplasticsurgery.com4646 Brockton AveRiverside, Ca 92506(951) 686-7600