Multiple temperature readings
I took my temperature when I first woke up in the night and then again at my usual wake-up time. Which temperature should I use?
In general, you should use the temperature from your regular wake-up time. If you get up in the night for any reason and you know that you will go back to sleep and wake again at your usual wake-up time, resist the urge to take your temperature. Taking your temperature more than once usually just leads to confusion and will often make you lose more sleep.
If you are not sure that you will be able to go back to sleep, you can take your temperature, but only use it on your chart if you are not able to go back to sleep. Always enter any special circumstances in the notes section of your chart so that you will remember what conditions might be affecting a temperature reading.
If you have learned through charting over several cycles that you are more likely to get an accurate reading after your longest resting time, rather than by taking your temperature at the same time, (when it is not possible to do both) then you can use the temperature that was taken after the longest sleep period. Over time (if necessary) you will learn the way your own temperature reacts to changes in waking and sleeping times.