Breast Implants Leak Due to Sleeping Position

Thanks for your question.
Typically saline implants manifest leaks quickly. This means that if there's a leak it should happen quickly. Slow leaks are very unusual for saline implants.
In addition sleeping on your stomach should not cause implant ruptures in any type of implant.
Anytime you're concerned about the shape change in your breasts you should see your surgeon.
I hope this helps!

In general, saline implant leaks can be detected quite quickly. It is not unheard of to have them deflate within 24 hours. Having said that however, yours may be compromised and be leaking slowly, as you suggested. It is important you see your surgeon to have your implants examined to ensure they are still in good shape.

Saline breast implants can fail or deflate at any time following implantatoin. However, when it happens, it usually becomes apparent following a few days. You can have a partial deflation for a short while; however, it eventually fully deflates if you wait long enough.
Breasts change over time, especially following augmentation. Changes occur with age, weight changes, pregnancy, etc. It is not uncommon to feel that one's breasts are getting smaller or 'looser' as the skin further expands and if you lose weight. This can lead to the feeling of 'rippling'. You should seek an appointment with your board certified plastic surgeon to evaluate your breasts. You may benefit from a silicone gel implant.

It sounds like it is not a leak. However, without examining you it is hard to tell. If you implants are saline filled and had a lead, the size would decrease much faster that what you are describing. It is best to go back to your surgeon for a consultation.

If you have a slow leak, it would take some time and the implant would eventually get smaller. If one side is doing this and the other isnt it may be a leak. Unlikely that this is happening to both sides. You may have enlarging of the skin envelope and decrease in your body fat and breast tissue to explain the rippling.
I would just recommend to go see your plastic surgeon and have him/her judge.
Hope that helps.