Fertility tracking
fertility tracking

Core Body Temperature for Fertility Tracking


This short note describes the use of Core Body Temperature sensor for Fertility Tracking.


About the use of Core Body Temperature for Fertility Tracking


What is Core Body Temperature?


Core body temperature is one of the four primary vital signs of our body. Core body temperature refers to the temperature of the body’s organs.

It fluctuates following physiological processes, such as circadian cycles, menstruation, illness or physical activity.

Therefore, it can allow to gain more insight about the internal or external parameters affecting those natural mechanisms. Many devices on the market attempt to estimate core body temperature via skin surface temperature. Due to the complexity of thermal regulation and environmental conditions, this estimate does not come close to the accuracy and reliability of greenTEG’s Core Body Temperature Sensor.


How Core Body Temperature Sensor can be used for Fertility Tracking?


For decades, body temperature have been employed to estimate women’s fertility window.

More specifically, a body temperature called the Basal Body Temperature (BBT) has been defined as the lowest natural, non-pathologic body temperature after a period of rest. [1]

This temperature have been employed by women to determine ovulation over the full duration of the menstrual periodic cycle.

This method has been used either as a way to maximize the pregnancy chances or on the contrary, or as an attempt to avoid fertilization as a contraceptive.

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In the process of charting body temperature, ovulation has been characterized by an increase of 0.5 to 1°F in your natural and non-pathologic lowest core body temperature, briefly after ovulation has occurred.

Consequently, this detection requires an accurate and reliable body temperature measurement and a comfortable and continuous measurement process.


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Are you interested to know more about fertility tracking via Core Body Temperature monitoring?

Download the full CALERA® Technology validation study for ovulation detection ! 


Why choosing Core Body Temperature Sensor for your Fertility Tracking ?


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CORE Body Temperature sensor presents the advantages to provide an accurate, non-invasive, remote and continuous core body temperature monitoring.

It is therefore perfectly suited to accompany any women in their search for a reliable and comfortable device to suit your needs.

greenTEG offers the world’s first core body temperature sensor for continuous and non-invasive measurements.

CORE Body Temperature monitor can perform accurate and reliable temperature measurement in the following body locations:

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Chest-worn core body temperature monitoring for ovulation detection
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Upper-arm or Wrist worn core body temperature monitoring for ovulation detection
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Ovulation Cycle clearly visible in continuous core body temperature signal. Continuous temperature signal differs between Luteal and Follicular phase. This can be seen in the basal body temperature, temperature amplitude, and time of lowest value.

The full CALERA® Technology validation study for ovulation detection is available here.



Which greenTEG’s Core Body Temperature monitoring solution for your Fertility Tracking project ?


greenTEG’s offers a unique patented sensing technology designed for OEM Integration, B2B / White Labeling and Research applications.

The combination of our miniaturized sensor and AI-based algorithms are the backbone of our technology.

Features & Advantages

  • Integration solution into any wearable in contact with skin. Chest-worn or wrist-worn.
  • Accurate algorithm to determine core body temperature.
  • SMD mountable 2mm x 2mm XU sensor.

This technology supports three sensing solutions designed to suit your application needs: 


Laser position and power

CALERA® Technology for OEM integration

To view the product: click here.

For the full product offering description:

Core Body Temperature monitoring solution for OEM integration for Wearable and MedTech applications.

CORE Body Temperature Monitor for B2B and White Labeling

To view the product: click here.

For the full product offering description:

Core Body Temperature monitoring solution for B2B & White Labeling.

Core body temperature monitor
CALERA Research

CALERAresearch for Research applications

To view the product: click here.

For the full product offering description:

Core Body Temperature monitoring solution for Research applications.


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Do you want to use the Core Body Temperature sensor to perform fertility tracking?

Contact our team of experts to help you adapt our solution to your project!



  • Discover all the Use Cases related to our technology, here.
  • Explore our product line, here.
  • Discover all the peer-reviewed publications using our technology, here.

References

[1] Steward K, Raja A. Physiology, Ovulation And Basal Body Temperature. [Updated 2021 Jul 22]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK546686/

[2] Shilaih M, Goodale BM, Falco L, Kübler F, De Clerck V, Leeners B. Modern fertility awareness methods: wrist wearables capture the changes in temperature associated with the menstrual cycle. Biosci Rep. 2018;38(6):BSR20171279. Published 2018 Nov 30. doi:10.1042/BSR20171279