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Why Does the BBT Sometimes Appear Blue and Sometimes Green?Updated 6 months ago

The backlight of the Basal Body Temperature (BBT) display changes color based on the temperature reading: 

- When the measured value is less than 99.5°F (37.50°C), a green backlight is displayed. 

- When the measured value is between 99.59°F and 101.28°F (37.50-38.49°C), a blue backlight is displayed. 

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