If you observe a religious fasting period (e.g. Ramadan, Yom Kippur, etc.) changes to your routine may impact your sleep, which can, in turn, affect your measuring routine.
How to measure with a basal thermometer
If your sleep routine while observing religious fasting periods differs significantly from your usual sleep routine (± 2 hours), we recommend excluding your temperatures for the first 1-2 of the switch. Once you have adjusted to the new routine, you can start measuring your temperature again each morning. When you return to your usual sleep schedule, it’s a good idea to exclude your temperature readings for another 1-2 days.
If your sleep routine is not affected (less than 2 hours), you do not need to make any measuring adjustments.
💡Remember to measure first thing in the morning, right after waking up (before sitting up, drinking water, eating, snoozing, or getting out of bed). Learn more about this here: When and how to measure your temperature with a basal thermometer.
How to measure with a wearable
If you use NC° with one of our approved wearables, you don’t need to make any adjustments. Sleeping differently doesn't impact your temperature as much when you measure continuously during the night as it does when measuring once in the morning.
Does fasting affect my menstrual cycle?
Changes in lifestyle, such as fasting, can potentially lead to irregularities in your menstrual cycle. However, the effects can vary from person to person, and you may not experience any changes. If you have concerns about irregularities in your cycle, please contact your healthcare provider.
You can still rely on Natural Cycles even if you have irregular cycles. Natural Cycles captures your unique cycle patterns by considering cycle irregularity, temperature fluctuations, ovulation day variation, sperm survival, and several other essential factors to provide a tailor-made solution for each individual. You can learn more about this here: Can I use Natural Cycles if I have irregular cycles?