Is a CGM Worth It in Pregnancy?
Reviewed by CDE Mehandi Sharma · Updated
After a few weeks of pricking your finger five times a day, a continuous glucose monitor starts to sound very attractive. It is worth being clear about what it does and does not solve in GDM.
A CGM is a small sensor worn on the skin that reads glucose continuously and sends it to a phone. Instead of five points a day you get a line, including the overnight hours nobody was testing.
Where it genuinely helps in GDM: seeing exactly what a specific meal does hour by hour, which is far more instructive than a single one-hour reading. Understanding a stubborn fasting number by watching the whole night. And reducing the sheer burden of testing during a pregnancy where you are already uncomfortable.
Where it is less essential: GDM management is built around specific fasting and post-meal targets, and a glucometer measures those perfectly well. Your care team's decisions will be based on those numbers either way.
The practical limit in India is cost. Sensors are a recurring expense, usually out of pocket, over a period of months.
A reasonable middle path is to use a sensor for two weeks rather than the whole pregnancy — long enough to learn which of your regular meals are the problem, then apply that with a glucometer.
Discuss it with your team rather than buying one and interpreting it alone.