Which thermometer can I use to measure my basal body temperature?

You can use mechanical or digital thermometers. What is important is that it displays 2 digits after the decimal point.

Please note that temperature values of different thermometers cannot be compared. For this reason, you should only change your thermometer at the beginning of a new cycle and not in the middle of it.

Please change your thermometer every year! It becomes less reliable after that point in time.

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