Nocturnal finger skin temperature in menstrual cycle tracking: ambulatory pilot study using a wearable Oura ring
Maijala, Kinnunen, Koskela, Jämsä, Kangas · 2019 · BMC Women's Health 19(1):150
Observational study · Rang 5 von 9
What this work gives Aellic
Nocturnal FINGER skin temperature across the cycle, measured with an Oura ring: luteal rise +0.30 ± 0.12 °C. That is the lower edge of the range Aellic uses and therefore the cold-start value for `body_temp`. Important for how this is read: skin, not core — distal skin temperature has the LARGER amplitude compared with an oral basal temperature (~0.20–0.23 °C), and skin is exactly what a wearable measures.
Correction of 26 July 2026
The registry attributed a flat “0.30–0.50 °C” to this paper; the 0.50 comes from zhu2021 and the 0.33 from shilaih2018 . These are three data sets, not one range from one source.
The entry on the register was wrong. It was not replaced but kept — with what holds instead standing next to it.
Where this sits in the engine
1 declared site — constants and thresholds in the code that point at this entry.
- Cycle Phases and cycle-aware baselines 1 site
Register entry maijala2019 · Observational study