Can the Oura Ring Be Used for Birth Control? An In-Depth Look at Risks, Science, and Realities
Biometric data guides fertility predictions for a nonhormonal contraceptive option.
The intersection of wearable technology and reproductive health is making waves in the world of contraception. Among the most debated innovations is the use of the Oura Ring—a sleek wellness wearable—in combination with the Natural Cycles app for birth control. Touted as a nonhormonal, data-driven approach to predicting fertility windows, this method is exploding in popularity online. But how effective is it, what do medical experts say, and what are the real-world pros and cons? This article examines the science, controversies, and lived experience of using the Oura Ring with Natural Cycles as a contraceptive strategy.
The Rise of Cycle-Tracking Wearables in Birth Control
Fertility awareness–based methods (FABMs) have been used for decades, typically relying on temperature, calendar, or cervical mucus monitoring. In recent years, digital technology has transformed this landscape. With the Oura Ring—a device originally designed for sleep and wellness tracking—now able to transmit biometric data directly into the FDA-cleared Natural Cycles app, a new era of self-managed, nonhormonal contraception has begun.
This trend has gained significant traction on social media platforms like TikTok, where users tout their experiences and debate the risks and rewards of relying on such technology for pregnancy prevention. However, the trend is not without controversy in medical circles and among users themselves.
How the Oura Ring and Natural Cycles App Work Together
The Oura Ring is a smart ring worn on the finger that measures several biometrics, including skin temperature, heart rate, and sleep patterns. When paired with the Natural Cycles app (the first digital contraceptive to earn FDA clearance in the US and TGA approval in Australia), the ring’s temperature data helps power algorithmic predictions of a user’s fertile window.
- The Oura Ring continuously tracks overnight changes in skin temperature.
- Natural Cycles uses this data, alongside menstrual cycle tracking, to identify which days are ‘fertile’ (high risk of pregnancy if unprotected sex occurs) and which are ‘non-fertile.’
- The app presents daily fertility status so users can modify behavior (e.g., abstain from unprotected intercourse or use additional protection on fertile days).
It’s important to stress that, according to Dr. Neta Gotlieb, senior product manager for women’s health at Oura, the Oura Ring itself is not a birth control device. Rather, it is a sophisticated data collection tool that ‘powers’ the contraceptive algorithm of Natural Cycles. The app is responsible for making fertility predictions, not the ring alone.
Effectiveness of the Oura Ring and Natural Cycles as Birth Control
The most pressing question for anyone considering this method: How reliable is it at preventing pregnancy?
| Method | Perfect Use Effectiveness | Typical Use Effectiveness |
|---|---|---|
| Natural Cycles + Oura Ring | 98% | 93% |
| Condoms | 98% | 87% |
| Birth Control Pills | 99% | 91% |
| Copper IUD | 99%+ for both | |
| Fertility Awareness Methods (general) | 95-99% | 76-88% |
98% effective with perfect use: According to Natural Cycles and Oura, if users always abstain from unprotected sex or use additional protection on ‘red’ (fertile) days, the method is about 98% effective at preventing pregnancy. With typical use—meaning imperfect tracking, occasional forgetfulness, or misinterpretation—effectiveness drops to about 93%.
For comparison, this is similar to the theoretical efficacy of condoms, but slightly lower than hormonal birth control methods like the pill or IUDs. The difference between perfect and typical use highlights the amount of user commitment and behavior change involved in this method.
Why Is This Method Controversial?
Despite its popularity online and the convenience it offers, relying on wearable-based fertility awareness for contraception is controversial for several reasons:
- User adherence: The effectiveness drops noticeably with imperfect use, which is common since avoiding unprotected sex or using emergency contraception on fertile days requires vigilance.
- Accuracy with irregular cycles: Many studies and device algorithms perform less reliably for users with irregular periods or hormonal fluctuations, such as postpartum women or those with PCOS.
- No STI protection: Fertility tracking methods do not protect against sexually transmitted infections, unlike condoms.
- Medical community skepticism: Many doctors and organizations recommend more established, less user-dependent contraceptive methods for those who absolutely do not wish to become pregnant.
Oura and Natural Cycles themselves are clear: None of these products are recommended as the sole form of contraception for everyone. Medical experts particularly caution individuals with irregular cycles, or those who want a ‘set it and forget it’ method, to consider more robust options.
Who Is Using the Oura Ring with Natural Cycles?
Awareness, curiosity, and adoption of digital fertility tracking are highest among younger women:
- 43% of Oura Ring users in their 20s (as of June 2024) have connected the ring with Natural Cycles
- 32% of Oura Ring users in their 30s are also using the feature
This surge reflects growing interest in nonhormonal, tech-driven approaches to health, and a desire among some to better understand their cycles—often motivated by side-effect concerns with hormonal contraceptives.
What Are the Costs?
The Oura Ring and Natural Cycles setup is a significant upfront and ongoing investment compared to traditional birth control:
- Oura Ring: Around $299 (price may vary by model and region)
- Oura Membership: $6.99 per month after a free trial
- Natural Cycles Subscription: $12.99 per month, or $89.99 per year (subject to discounts and region)
Total yearly costs can run between $180 and $250 annually after the initial hardware purchase. For those using the system over several years, it can be more cost-effective than some prescription contraceptives without insurance—yet significantly more expensive than many generic methods or long-acting contraceptives provided under healthcare plans.
How Accurate Is Ovulation Detection with the Oura Ring?
Clinical research indicates the Oura Ring is one of the more accurate consumer devices for detecting ovulation in real time. A recent peer-reviewed study found that its physiological method correctly detected 96.4% of ovulatory cycles, a notably higher rate than most wrist-worn wearables.
However, the accuracy refers to detecting ovulation in retrospect. Predicting precisely when ovulation will occur (which is crucial for contraception) is inherently trickier.
Key findings:
- Oura was on par with (or outperformed) common methods like cervical mucus tracking.
- Performance was more reliable in regular cycles than in irregular ones.
Bottom line: Oura provides strong data for the Natural Cycles algorithm, but the ultimate effectiveness of cycle-based birth control always depends on behavior and correct interpretation of fertility windows.
Benefits and Drawbacks: Weighing the Pros and Cons
| Benefits | Drawbacks |
|---|---|
|
|
How Does This Method Compare to Other Non-Hormonal Options?
Besides fertility-awareness apps, other non-hormonal methods include condoms, diaphragms, copper IUDs, and, occasionally, emergency contraception. A quick snapshot:
- Copper IUD: Over 99% effective; long-acting, no daily attention needed; must be placed by a clinician.
- Condoms: 98% effective with perfect use, but typical use drops to 87%; also provide STI protection.
- Fertility Awareness (calendar/mucus methods): 76–88% effective with typical use, may be less accurate without digital aids.
Using a validated wearable like Oura may improve the accuracy of fertility awareness, but it still depends on consistent user behavior and cannot replace the reliability of methods like the IUD.
Hormonal Birth Control: What Happens to Your Cycle?
Individuals using hormonal contraception should note that many cycle-tracking apps—including Oura’s own insights feature—are not intended for use with irregular, hormone-altered cycles. When on hormonal methods, periods are typically ‘withdrawal bleeds’ not genuine menstrual periods, making biometric-based cycle tracking ineffective.
Regulatory Status and Medical Recommendations
- Natural Cycles is FDA-cleared for use as a contraceptive device and is recognized by Australia’s TGA. The Oura partnership was subject to additional review and clearance.
- The Oura Ring is classified as a wellness device, not as a medical-grade contraceptive. Pairing with Natural Cycles does not make the ring itself a birth control method.
- Doctors stress individualized risk assessment: What works for one person’s body, cycle, and lifestyle may not work safely for another.
Who Should Consider the Oura + Natural Cycles Combo?
This method might be appropriate for those who:
- Seek a nonhormonal, tech-driven approach to contraception
- Have regular menstrual cycles
- Are willing to track biometrics and follow app instructions closely
- Understand and accept the limitations of fertility-awareness as birth control
It’s less suitable for those who:
- Require the highest possible effectiveness in birth control
- Have very irregular cycles
- Frequently miss wearing the device or logging data
- Need protection against STIs
FAQs: Oura Ring and Natural Cycles for Birth Control
Is the Oura Ring alone a birth control device?
No. The Oura Ring is a health tracking device. Only when paired with the Natural Cycles app can your temperature data be used to inform predictions about your fertile window.
What happens if I forget to wear my Oura Ring?
Missing data can make cycle prediction less accurate, potentially increasing the risk of unintended pregnancy if app guidance is not followed. The app may mark days as ‘high risk’ when insufficient data is available.
Does this method work if I have irregular cycles?
Effectiveness is lower in irregular cycles. Most research and algorithms are validated on regular menstrual patterns, making cycle-based predictions less reliable for those with unpredictable cycles.
Is this cheaper than other forms of birth control?
Long-term costs may be competitive compared to some prescription options, but upfront expenses are significant. It is costlier than free options like condoms or methods covered by most insurance.
Does this method protect against STIs?
No. The Oura Ring and Natural Cycles provide no protection against sexually transmitted infections. Condoms should always be used for STI prevention.
Expert Takeaways
- This method is highly user-dependent and best for individuals seeking nonhormonal options who are comfortable with proactive engagement in their fertility tracking.
- While 98% effective with perfect use, real-world effectiveness is lower due to imperfect adherence and inevitable human error.
- Medical experts recommend careful consideration of your personal needs, risk tolerance, and consultation with a healthcare provider before relying solely on this or any fertility awareness–based method for birth control.
Summary: Should You Trust the Oura Ring for Birth Control?
The Oura Ring, when paired with Natural Cycles, represents a major advance in digital fertility awareness—but it is not a magic bullet. Effectiveness hinges on user commitment, cycle regularity, and understanding that fertility tracking cannot rival the reliability of some established contraceptives. For those who are motivated and informed, this method can be a viable part of a comprehensive contraceptive strategy. For absolute peace of mind, traditional methods remain the gold standard.
References
- https://harpersbazaar.com.au/oura-ring-birth-control-experience/
- https://www.goodhousekeeping.com/health/wellness/a62263942/oura-ring-for-birth-control/
- https://thelowdown.com/blog/the-lowdown-on-natural-cycles-and-the-oura-ring
- https://ouraring.com/blog/types-of-birth-control/
- https://www.jmir.org/2025/1/e60667
- https://www.naturalcycles.com/research-library/how-effective-is-natural-cycles-when-used-with-the-oura-ring
- https://pubmed.ncbi.nlm.nih.gov/33370220/
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