In this study, we will follow thirty women undergoing prophylactic skin-sparing mastectomy with immediate implant-based reconstruction. At the time of surgery, patients will be randomly assigned ES to either the right or left breast. That breast will be reconstructed first and stimulated for one hour while the other breast is reconstructed. At the completion of the case, all wires will be removed. We will test sensation (tactile, temperature, 2-point discrimination, sharp/dull discrimination, and protective sensation) prior to surgery then again at 6, 12, 18, and 24 months following surgery to evaluate the effects of ES on sensory return. Patients will be provided with a survey to assess return of erogenous sensation.