What's a Basal Thermometer?

Basal body temperature is the lowest body temperature attained during rest. It is usually estimated by a temperature measurement immediately after awakening and before any physical activity has been undertaken. This will lead to a somewhat higher value than the true BBT.

What is the difference between a basal thermometer and a normal one?

A basal thermometer measures your temperature, just like a regular digital thermometer. The difference is that it measures very small increments: 1/10th or even 1/100th of a degree.

Where do you put a basal thermometer?

Keep your thermometer accessible from your bed so you do not have to get up to get it. If you are taking your temperature orally make sure to place the thermometer towards the back of your mouth and under the tongue for better accuracy. Use the same thermometer throughout your cycle if possible.