Do you gain weight after breast augmentation?

Thanks for your inquiry,  a 400 cc implant weighs about 1 pound.  In addition after surgery, you do retain fluids for a little while but that should resolve after a few days.  Good Luck.  

The only long term weight gain from breast implants will be the 1-2 lbs that the implants weigh.  All other weight gain can be attributed to changes in diet, exercise and aging.