Science & Research
Grounded in science, driven by research
Our approach to combining clinical research, innovative technology, and user feedback is helping us create the most scientifically validated smart ring.
Our research-driven approach to innovation
At Oura, we develop cutting-edge sensing technology that exceeds the highest scientific standards and pursue original discoveries that deepen the understanding of human health.
30+ PhDs
across our data science, engineering, and health science research teams
130+
peer-review publications contributing to advancing science
10+ Years
of research and innovation
14
active collaborations with academic and clinical institutes worldwide
Unparalleled accuracy
Research-Grade Sensors
Oura Ring is powered by sensors that adapt to your unique physiology — delivering accurate, continuous data, day and night.
- Red and infrared LEDs measure blood oxygen levels while you sleep
- Green and infrared LEDs alternate to measure heart rate and heart rate variability 24/7 and respiration rate during sleep
- Negative temperature coefficient (NTC) sensor tracks temperature trends
- 3D Accelerometer tracks movement and activity 24/7
99%
Heart Rate Accuracy r² compared to ECG22
98%
Heart Rate Accuracy Variability r² compared to ECG22
94%
Ovulation Detection Accuracy Compared to ovulation prediction kits
79%
Sleep Tracking Accuracy Compared to clinical polysomnography by at 83%
Unparalleled accuracy
Research-Grade Sensors
Oura Ring is powered by sensors that adapt to your unique physiology — delivering accurate, continuous data, day and night.
- Red and infrared LEDs measure blood oxygen levels while you sleep
- Green and infrared LEDs alternate to measure heart rate and heart rate variability 24/7 and respiration rate during sleep
- Negative temperature coefficient (NTC) sensor tracks temperature trends
- 3D Accelerometer tracks movement and activity 24/7
99%
98%
94%
79%
99%
98%
94%
79%
Independently validated sensors
Oura Ring’s sensing capabilities have been independently validated in several peer-reviewed publications, including the Journal of Medical Internet Research, Sensors, and Sleep Medicine.
The Promise of Sleep: A Multi-Sensor Approach for Accurate Sleep Stage Detection Using Oura Ring
Oura Ring's Ovulation Detection Algorithm Outperforms Calendar Tracking Method in New Validation Study
Heart Rate and HRV: Oura Ring’s Average Nighttime Values Correspond Near-Perfect with ECG
What does Oura Ring measure?
Powering research published in over 130 peer reviewed publications
Top researchers and institutions use Oura Ring in their research to
improve public health.
Physiological Data Collected from Wearable Devices Identify and Predict Inflammatory Bowel Disease Flares
ScienceDirect May 2025
Biometrics of Complete Human Pregnancy Recorded by Wearable Devices
npj Digital Medicine Aug 2024
Effects of Fluid Intake on Sleep Duration and Quality Among Healthy Adults
Nature and Science of Sleep May 2025
Exploring the Potential of a Smart Ring to Predict Postoperative Pain Outcomes in Orthopedic Surgery Patients
Sensors Aug 2024
Predicting Stress in First-year College Students Using Sleep Data from Wearable Devices
PLOS Digital Health Apr 2024
Elevated Body Temperature is Associated with Depressive Symptoms: Results from the TemPredict Study
Science Reporter Feb 2024
Researchers have used Oura Ring to study cycle and ovulation regularity, the association between body temperature and depression, and more.
A study collected data to inform numerous Oura algorithms, including Daytime and Workout Heart Rate, Automatic Activity Detection, and Daytime Heart Rate Variability.
A large-scale research effort using Oura Ring data to retrospectively analyze 10,000 pregnancies, advancing public understanding of pregnancy-related conditions and identifying potential warning signs of complications.
The National University of Singapore found Oura Ring to be the most accurate consumer wearable for sleep tracking among the devices studied.
A groundbreaking collaboration between Oura, Duke University, Google Fitbit, UNC-Chapel Hill, and other leading organizations to explore how physiological and behavioral data from wearable devices can help identify early signs of opioid relapse.
Data was collected and used in developing and validating the newest version of Oura Ring’s sleep staging algorithm, as well as Oura Ring’s blood oxygen sensing (SpO2) feature.
Highlights from Oura-led research
FEATURED STUDY
Oura Launches First Clinical Trial to Measure AI Advisor's Ability to Promote Cardiovascular Health
Country Differences in Nocturnal Sleep Variability: Observations from a Large-scale, Long-term Sleep Wearable Study
Aug 2023
Predicting Labor Onset Relative to the Estimated Date of Delivery Using Smart Ring Physiological Data
Sep 2023
Feasibility of Measuring Physiological Responses to Breakthrough Infections and COVID-19 Vaccine Using a Wearable Sensor
Mar 2023