Cycle & Ovulation Pilot Study
This study dives into the science behind hormonal patterns and their alignment with Ultrahuman's predictive algorithms, offering unparalleled insights into cycle phases and fertility.
Read the studyWomen’s Health
With you in every
Phase
Wherever you are in your journey, the Ultrahuman Ring AIR redefines reproductive health. Track your cycle, fertility, or pregnancy seamlessly, and with precision—all free.
Get started
Cycle Tracking
Track your cycle with the Cycle & Ovulation PowerPlug. The Ring identifies key phases—menstrual, follicular, ovulation, luteal—using period logs and biomarkers like temperature, RHR, and HRV. Hormonal shifts shape these insights, offering deep body awareness.
Conception
Trying to conceive? The Cycle & Ovulation PowerPlug predicts your 7-day fertile window using biomarkers like temperature, RHR, and HRV. These hormone-driven signals track cycle changes, pinpointing ovulation with precision for confident planning.
Pregnancy
The Pregnancy Insights PowerPlug offers tailored guidance on nutrition, activity, and health metrics. Stay informed about your health and your baby’s development with insights designed to ensure safety and well-being throughout your journey.
Cycle Tracking
Track your cycle with the Cycle & Ovulation PowerPlug. The Ring identifies key phases—menstrual, follicular, ovulation, luteal—using period logs and biomarkers like temperature, RHR, and HRV. Hormonal shifts shape these insights, offering deep body awareness.
Conception
Trying to conceive? The Cycle & Ovulation PowerPlug predicts your 7-day fertile window using biomarkers like temperature, RHR, and HRV. These hormone-driven signals track cycle changes, pinpointing ovulation with precision for confident planning.
Pregnancy
The Pregnancy Insights PowerPlug offers tailored guidance on nutrition, activity, and health metrics. Stay informed about your health and your baby’s development with insights designed to ensure safety and well-being throughout your journey.
Cycle Insights
Redefining cycle and fertility tracking
The Ultrahuman Ring is the first in the world to predict the fertile window through a single device, using real-time data from biomarkers like skin temperature, HRV, and RHR. Unlike traditional methods, it provides proactive, accurate, and seamless fertility insights without relying on multiple apps or subscriptions.
Cycle tracking
Your cycle, decoded
Track your cycle with the Ultrahuman Ring. Identify menstrual, follicular, ovulation, and luteal phases using biomarkers like temperature, RHR, and HRV.
Conception
Plan smarter with fertility insights
The Ultrahuman Ring predicts your 7-day fertile window by analyzing biomarkers to pinpoint ovulation, helping you plan your reproductive journey with confidence.
How your Fertile Window is predicted
The 7-day fertile window is predicted by tracking biomarkers like skin temperature, RHR, and HRV throughout the cycle. These patterns help estimate fertile days before ovulation. Accuracy improves as more data is collected and analyzed over time.
Biomarker Based
Your cycle decoded with biomarkers
Decoding your cycle with temperatureTracking recovery across your cycleA window into your hormonal shifts
Subtle temperature shifts tell a powerful story. Throughout your cycle, these changes reflect hormone regulation, metabolism, and recovery. Understanding these trends provides deeper insights into how your body adapts, rebuilds, and performs during each phase.Tracking HRV decodes your cycle by revealing hormonal shifts. Higher HRV shows resilience in the follicular phase, while luteal dips reflect increased demands. These patterns reveal how stress, recovery, and hormones influence your well-being.RHR offers insights into cycle health, trending lower in the follicular phase for recovery and rising in the luteal phase with hormonal and metabolic changes. Tracking RHR reveals how your body adapts, shedding light on energy, readiness, and balance.
Whitepaper
Science that moves health forward
Pregnancy Insights
Guidance tailored to your pregnancy
Dive into your pregnancy journey with the Pregnancy Insights PowerPlug. Track how physical changes evolve across trimesters, alongside key lifestyle metrics like sleep, HRV, RHR, and activity levels. Gain a clear, connected view of how these elements shape your health and your baby’s development.
Your data is secure, private, and always under your control.
One ring to track your reproductive health.
Experience seamless cycle, fertility and pregnancy tracking, without the pink tax.
Don’t have the Ring?
The Ultrahuman Ring tracks your fertility and cycle health with biomarkers like temperature, HRV, and RHR. Get yours to unlock the full suite of women’s health PowerPlugs.
Buy now
Already have the Ring?
Awesome. Head to the PowerPlugs Store to check out the PowerPlugs for women’s health.
Get startedQuestions?
How does the Ultrahuman Ring predict my fertile window and ovulation day?
The Ultrahuman Ring predicts your ovulation and fertile window by analyzing key biometrics: skin temperature, heart rate variability (HRV), and resting heart rate (RHR). It uses historical data from your previous cycles to identify patterns and combines this with real-time biomarker tracking to adjust predictions as your cycle progresses.
What is a “fertile window,” and why is it important?
The fertile window is a 7-day period in your cycle when conception is most likely if you're trying to conceive. It includes the 5 days leading up to ovulation, the ovulation day itself, and the day after. Ultrahuman Ring provides a probable fertile window based on your unique biomarker data.
How accurate are the fertile window predictions?
Ultrahuman’s fertile window predictions are accurate, with a median difference of 1 day compared to at-home hormonal testing kits and a 2-day difference compared to calendar or rhythm-based methods. The algorithm combines real-time biomarker tracking (skin temperature, HRV, and RHR) with historical data, dynamically adjusting to a woman’s unique cycle transitions. As more data is collected over time, the algorithm continuously refines its accuracy, making it a reliable tool even for women with subtle cycle variations. However, factors such as lifestyle changes, stress, or health fluctuations may still slightly impact prediction precision.
How is my data used to predict ovulation when my cycle is irregular?
For irregular cycles, the algorithm places greater emphasis on real-time biomarker trends (temperature, HRV, and RHR) over fixed cycle duration. By closely analyzing these natural body responses, the Ultrahuman Ring adapts predictions to align with the unique patterns found in irregular cycles.
What biomarkers does the Ultrahuman Ring track, and why are they important?
Skin Temperature: Varies across cycle phases, rising after ovulation as progesterone levels increase, helping identify transitions.
Resting Heart Rate (RHR): Fluctuates through the cycle, generally increasing around the fertile window, aiding in tracking fertility-related changes.
Heart Rate Variability (HRV): Changes throughout the cycle, typically lower in the luteal phase, signaling shifts in hormonal balance
These dynamic biomarkers offer a nuanced, phase-by-phase view of the menstrual cycle, enhancing prediction accuracy and personalization.
How does the ring handle missing or fluctuating data?
The algorithm smooths data fluctuations by using rolling windows. This method ensures minor daily variations don’t affect accuracy and provides a reliable trend over time.
How does my age and BMI affect predictions?
Age and BMI can influence baseline biomarkers and ovulation timing. Ultrahuman Ring adjusts predictions by grouping users with similar profiles, refining predictions based on trends observed in similar community personas.
Is my data secure?
Yes, Ultrahuman places a high priority on data privacy, especially for sensitive health information. Your biomarker and cycle data are securely stored, encrypted, and used solely to provide personalized insights. For more details, please read our privacy policy here.
User Control over Data: Users have full control over their data, with the option to delete or export it anytime. Ultrahuman’s practices comply with GDPR and HIPAA regulations, ensuring robust user rights and data security.
ISO 27001 Certified: Ultrahuman follows up-to-date security protocols to protect your information, underscored by our ISO 27001 certification.
What are the limitations of Ultrahuman’s Fertile Window prediction algorithm?
While non-invasive and convenient, physiological markers like RHR, HRV, and temperature can be affected by factors like infection, stress, or chronic health conditions. As such, while robust, the algorithm is best supplemented with clinical insights when planning key health decisions.
How does period prediction work?
Period prediction is based on analyzing past period data and your current biomarkers like temperature, HRV & RHR to forecast the next period’s start and end dates. The algorithm takes into account your past cycle patterns, typical cycle length, and recent cycle duration to estimate the timing of your next period.
The Ultrahuman Fertile Window feature provides educational information about menstrual cycle phases and potential fertility patterns to help women understand their body's natural rhythms. It is not intended for use as a contraceptive, a sole method to achieve pregnancy, a medical diagnostic tool, or a substitute for professional medical advice. Insights are based on individual biomarker patterns and statistical data, but cycle variations may occur, and actual fertility windows may differ. For medical advice, diagnosis, treatment, or guidance on fertility, conception, or contraception, consult a qualified healthcare provider.
