The Mira Basal Body thermometer helps you recognize your fertile patterns by measuring your basal body temperature (BBT). Use it to understand the rise and fall in your body's temperature during your menstrual cycle. Then, sync and save your data on the Mira App to get more insights! Quick and easy measurements Measures in Fahrenheit and Celsius Connects easily to the free Mira App See your BBT results history + charts on your smartphone