The Science Behind Percept

Clinically tested. Accuracy validated.

breakthrough technology in ovulation prediction.

Percept leverages a proprietary algorithm that monitors vital signs while you sleep in order to predict your ovulation, period, sleep quality, and relaxation levels. Using a technology originally developed for hospitals, Percept predcits ovulation more accurately than most standard methods*.

(*Determination of the Ovulation Time: Characterization and Evaluation of Hormone Levels Prediction Values)
Behind the scenes of Percept
The sensor tracks your body's signals while you sleep including heart rate, breathing rate and heart rate variability.
The heart rate, breathing rate, and movement signals are differentiated using EarlySense's advanced signal analysis.
Percept accurately predicts ovulation dates based on patterns / changes in your body's vital signs.
The artificial intelligence technology continuously learns your cycle over time and improves prediction accuracy every month.

what makes percept



Percept does not require temperature-taking. EarlySense® discovered there is a better, easier way accurately predict ovulation. Because heart rate is directly correlated with temperature during a woman’s cycle, Percept™ can accurately detect ovulation dates by monitoring heart rate and other body signals while you sleep.


How can a contactless sensor detect heart rate and breathing rate? The Percept sensor is very sensitive to mechanical motions and vibrations, coming from 3 types of signals:

  1. The general body motions
  2. The lungs motion when breathing
  3. The heart’s motion when it beats

Percept separates the heart and breathing signals using EarlySense®’s advanced and proprietary signal analysis algorithms which identidy unique patterns that are associated with ovulation**. These vital-detecting algorithms—the same that are used to monitor patients in hospitals worldwide—have been validated in numerous clinical studies and were found to be 95% accurate.






monitors and predicts fertility through changes

in body signals.


So, how can heart rate, breathing rate, and heart rate variability be used to detect fertility? The graph to the right shows that ovulation occurs during the transition from the follicular phase and the luteal phase. Before ovulation, there is a fertility window of up to 6 days which is when intercourse should take place for increased chances of conception.



Clinical studies have established a link between an increase of the woman’s heart rate and heart rate variability (HRV) leading up to ovulation. After that, the rate decreases to their original levels. This rise is similar to the one normally measured in the basal body temperature (BBT).


Although basal body temperature-taking is a standard method of ovulation prediction,it relies on a woman remembering to take a single daily reading each morning, which may be inconvenient and prone to user error. To eliminate these challenges, Percept™ measures at the optimal time (during deep sleep) and does so automatically throughout the night, ensuring the most accurate prediction possible. Furthermore, Percept™ can provide a longer fertility window to work with, whereas BBT measurements provide only a 12-hour window after the rise in temperature.


EarlySense’s clinical trial has shown that the breathing rate can also show patterns that indicate ovulation as the breathing rate decreases towards ovulation and then goes up again to its original levels.


In order for the predictions to be as accurate as possible, the user can input the first day of her period every month into the mobile app. This helps Percept™ learn her body’s signals over time, and by inputting this information Percept™ becomes even more accurate.


Every woman’s body is unique and slightly different. At the end of every menstrual cycle, Percept™ analyzes the patterns and updates the AI algorithm parameter to become even more accurate and personalized for the next month. The more you use Percept™, the more optimized it becomes for you.


click to enlarge




sleep, stress, and fertility

are interconnected.


Reproductive hormones are regulated through a 24-hour cycle. Lack of sleep and sleep disruption produces stress responses which may ultimately affect fertility. For example, one study showed that women exhibiting high stress levels are 12% less likely to get pregnant each cycle.


Stress affects reproductive hormones like TSH (throid-stimulating hormone) and LH (luteinizing hormone), and an increase in LH is associated with infertility. In a study of 656 women having IVF, they found those who had between 7 and 8 hours sleep per night were 25% more likely to become pregnant than those who got 9 hours or more. Similarly, they were 15% more likely to conceive than women who slept for less than 7 hours per night.


Many Percept™ users are often surprised when shown accurate readings of how much they actually sleep during weekdays and weekends. By getting accurate data and tips on how to optimize sleep and relaxation, you can increase your chances of becoming pregnant faster.  Percept’s hospital proven technology promotes a calmer mindset and a holistic approach to becoming pregnant sooner.






percept by the



Percept’s advanced multi-parameter analysis detects the body’s internal signals, providing an accurate prediction and detection of ovulation and menses.


Clinically proven with hundreds of cycles tracked, Percept:

  • Predicts when a woman is most fertile with 31% higher accuracy than standard ovulation estimation processes that are based on the last period calculation.
  • Predicts the exact day of ovulation in over 60% of cycles within one day, and within two days of ovulation in over 75% of cycles.
  • Offers up to a six-day fertility window.
  • Precisely highlights best days to try to get pregnant.
  • Helps women better understand and plan their schedules by precisely predicting the day their period will start within 1.3 days on average.

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