Breast implants including sensor modules and related methods are described herein. Breast implants include those with: a shell configured to be substantially filled with a viscous material; at least one fluid-permeable cover, the cover completely enveloping the shell; and a plurality of sensor modules attached to the shell and positioned at a distance from each other, each of the sensor modules oriented to detect one or more analytes in a fluid between the shell and the cover, wherein each of the plurality of sensor modules includes a unique identifier and is configured to utilize energy transmitted from an external source.