Will My High Profile Under Muscle Silicone Implants Drop?

It takes three to four months for implants to settle. At that time your breasts will take on a more natural appearance with the bottom portion more rounded out. Dropping and fluffing, as it's called, can also occur faster in one breast than the other. Tissue expansion will alleviate the tightness you may be feeling as well. 

I find that submuscular silicone implants don't actually drop.  If correctly positioned interoperatively, a partially submuscular, high profile implant has an upward displacement of the fluid within the implant due to the tight pressure from the pectoralis muscle.  As the muscle relaxes, given time and some aid from an ace wrap or a Bando placed high on the chest, the internal fluid will reposition downward.  Also, transaxillary augmentations create a lot of swelling at the top of the breast, which also creates the illusion of a high placed implant. 

The subsiding of the swelling and the downward movement of the implant fluid usually takes weeks to months to settle, and is different for every patient. 

High implants 3 weeks after surgery will drop.  Typically, it takes 3 to 4 months to see final results.  Sometimes it takes longer, up to a year.