Are low profile saline implants over the muscle too noticeable?

Hi.  I would be very hesitant to place a saline implant over the muscle because they do not tend to look as natural and are more likely to show rippling when they are placed above the muscle.  If you do not have adequate tissue in the upper portion of the chest to help camouflage the implant then you will likely see rippling and the edge of the implant which can be visually unappealing.  I would recommend consulting with a board certified plastic surgeon with good experience with breast augmentation to go over the risks and benefits and pros and cons of various different approaches.  Good luck and take care, Dr. Howell

Hello, thank you for your question and provided information as well..
Based in your question, I dont recommend saline implants anymore, since they last less (6-7 years only). I recommend silicone implants, for a more rounded and natural look, you could achive this look if you consider breast augmentation sub muscular. 
Know that the size, profile, and shape of the implant is based on your desired breast size/shape, your chest wall measurements, and soft tissue quality.  This decision should be based on a detailed discussion with equal input from both you and your surgeon.   
Best of lucks.
Dr. Luis Mejia.