@daisymae, do you have a link to share?
I am aware of another 90-day sensor (“EverSense”) that is implantable, by start-up Senseonics, that is undergoing trial:
The Senseonics site is here: http://www.senseonics.com/. They also have a separate site for the technology: https://eversensediabetes.com/
The sensor appears solid, based on this research study: Multisite Study of an Implanted Continuous Glucose Sensor Over 90 Days in Patients With Diabetes Mellitus - PubMed
I just realized it is already approved in some parts of Scandinavia: http://www.diabetesincontrol.com/new-implantable-cgm-receives-approval/. I am curious if anyone has heard any report of its use?