Question

How does the skin temperature measurement during sleep help predict cycles?

Answer

[Countries that only support Watch]

• If you wear your watch while you sleep at night, your skin temperature during sleep can be measured, which is highly correlated with your basal body temperature. During the period before and after ovulation, the basal body temperature increases by approximately 0.3 to 0.5 degrees Celsius. Cycle tracking consists of two main segments based on the day of ovulation.
• The period from the beginning of the cycle to ovulation corresponds to the follicular phase, and after ovulation occurs, the luteal phase begins. If you wear the watch continuously, it can detect the difference in temperatures of the pre- and post-ovulation period. This temperature difference is used to detect when you ovulate and predict your cycle more accurately.

[Countries that support both the Watch and the Ring]

• If you wear your watch or ring while you sleep at night, your skin temperature during sleep can be measured, which is highly correlated with your basal body temperature. During the period before and after ovulation, the basal body temperature increases by approximately 0.3 to 0.5 degree Celsius. Cycle tracking consists of two main segments based on the day of ovulation.
• The period from the beginning of the cycle to ovulation corresponds to the follicular phase, and after ovulation occurs, the luteal phase begins. If you wear the watch or the ring continuously, it can detect the difference in temperatures of the pre- and post-ovulation period. This temperature difference is used to detect when you ovulate and predict your cycle more accurately.