Thank you for the question. You are correct, generally speaking, that a patient's anatomical “starting point” will play a significant "role" in the outcome that you can expect with breast augmentation surgery.  Careful breast implant pocket dissection and judicious selection of breast implant size/profile will help decrease the space between the breasts as much as safely possible.  On the other hand, over dissection (in the attempt to improve the "cleavage area") or the use of  breast implants that are too large for the patient's dimensions, can be problematic,  resulting in the need for revisionary breast surgery.