Oura is adding hormonal health insights to its Series 3 and 4 rings. Users can log their birth control method and the ring will attempt to correlate this with physiological data — resting heart rate, heart rate variability, and temperature fluctuations. The goal is to surface potential side effects that often go undiscussed in doctor's offices.
This is a notable expansion for a device already collecting intimate biometric data. Birth control side effects are notoriously under-tracked in clinical settings because they develop slowly and vary significantly person-to-person. A wearable that claims to spot patterns could be genuinely useful — or it could send users down a rabbit hole of spurious correlations.
The data quality and actual clinical utility remain to be seen.