Thank you for the question. There are pros and cons to the placement of breast implants in the “sub muscular” position versus the "sub glandular position”. I will try to outline some of the differences here; you may find the attached link helpful as well. I think it is in the best interests of most patients seeking breast augmentation surgery to have implants placed in the “dual plane” or sub muscular position. This positioning allows for more complete coverage of the breast implants leading to generally more natural feel/look of the implants in the long-term. This position will also decrease the potential for rippling and/or palpability of the implants (which may increase with time, weight loss, and/or post-pregnancy changes). I think that breast implant placement in the sub glandular position (over the shorter or longer term) tend to be associated with more problems with visibility (rippling) or palpability. Basically, the more coverage we have overlying breast implants, the better the long-term look/feel seems to be. The submuscular positioning also tends to interfere with mammography less so than breast implants in the sub glandular position. The incidence of breast implant encapsulation (capsular contraction) is also decreased with implants placed in the sub muscular position. On the other hand, sub glandular breast implant positioning does not have the potential downside of “animation deformity” ( movement/ distortion of the breast implants seen with flexion of the pectoralis major muscle) that can be seen with breast implants placed in these sub muscular position. I hope this (and the attached link/video, dedicated to breast augmentation surgery concerns) helps. Best wishes for an outcome that you will be very pleased with.