Do I have an abnormal wide gap between my breasts and will a BA help with cleavage? (Photo)

Cleavage is determined by two factors: breast fullness (specifically upper pole fullness) and breast placement on the chest wall. While volume can be influenced by breast augmentation, the space between one's breasts is a fixed variable. This gap is determined by the width of a patient's chest (sternum) and the insertion of the pectorals muscle. An implant cannot be forced any further medially than is allowed by the medial border of the muscle. One way to address this is by avoiding sub-muscular placement. However, this approach has it's own unique costs and benefits which must be considered in each patient.As always, discuss your concerns with a board certified plastic surgeon. 

If you just move the implants towards the center without also moving the areola with them then your will look "cross-eyed". It is relatively straight forward to do both using a mastopexy technique.

The key is the correct model/width given the person's "gap" and breast dimensions. The best way is to have a surgeon that is an expert to assist you to achieve the look you desire.  

Patients with wide cleavage due to wide insertion of the pectoralis muscles should avoid under the muscle placement of implants.  Over the muscle silicone implant placement will allow more natural cleavage and avoid the jumping breast deformity.The medial attachments of the pectoralis limit medial fullness.  They act as a wall.  As the implant increases in size, it is pushed toward and into the axilla.  Breasts with wide cleavage and lateral fullness to start with, beware of under the muscle placement.

Your cleavage will be determined by 2 main factors. First, your anatomy with attachment of the medial pectoralis muscle to the sternum and second, the pocket dissection by your surgeon. It is imperative that the plastic surgeon not open too far lateral or to the side.