kegg chart review: Irregular Cycles & Temps - kegg

kegg chart review: Irregular Cycles & Temps

Join us, as we review some interesting kegg charts and dive into some factors that influenced these women's charts. Thank you to our anonymous users for sharing their charts and experiences with us! In each chart kegg provided a unique glance into the complex hormone orchestration happening within these women's bodies.

Kristina Cahojova, kegg CEO and founder
Andrea Bradwick, kegg Community Manager

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Here is a regular kegg chart example of how a healthy cycle looks.  Nevertheless, in this blog post, we will explore what happens to your kegg chart when one doesn’t follow the user-manual or uses kegg in unusual circumstances. It is always fascinating to see how greatly charts vary, but also follow the same trend. It is important to say that some users chose to use their kegg outside of the kegg intended purpose because kegg data are useful for them. 

Use-Case: International travel , time change, lot of stress
Ovulation: Cycle day 15th-16th
 Fertile Window: 11-16

In this very interesting chart, our user reports that she was traveling internationally throughout her cycle. She also stated that she was under immense stress and running on very little sleep. This gal didn’t use kegg all of her fertile window days so it seems like she ovulated on day 14 but it is more likely that she ovulated on cycle day 15 or 16 where her kegg testings are missing. Assuming that her luteal phase is 14 days long as it was in her previous cycle that would put her ovulation on cycle day 15. This user uses Sympto-Thermal Method so she is taking her basal body temperature with Tempdrop as well. As you can see, her temps don’t follow a healthy cycle pattern. She attributes this to her stress and changes in her sleep (time zones, inadequate sleep).

Despite her insufficient kegg testing, there is a visible downward kegg trend, with the lowest value of her whole cycle occurring during her fertile window on cycle day 14, followed by the rise (though she didn’t record at least 3 elevated values because of skipped testing). Although her progesterone tests also confirmed that she ovulated as she suspected according to kegg, she did not conceive during this cycle and didn’t have sex during her fertile window.

kegg data
Temperature chart (collected via Tempdrop)

Use-case: Unprotected sex minutes before using kegg
Ovulation: Cycle day 14-15
Fertile Window: 10-14

On this chart, the user was not able to use her kegg on cycle days 13, 19-21, and 27-30, but she was still able to identify her trend.  This user reports she had unprotected sex on cycle day 24 and used kegg minutes after, as she wanted to see how this would impact her trend for the day. Please note, per our user manual, it is not recommended that kegg be used for at least 8 hours after unprotected sex, as the residual fluid will impact the kegg results, which is seen here in this example. The residual fluids from unprotected sex distorted kegg sensing, resulting in an electrolyte dip. This should not be considered “fertile window” as it does not follow the parameters for the drop and rise, and also is a known external variable that is responsible for the dip on that day. kegg is smart. The kegg method accounts for the trend and when it occurs within the cycle to make its predictions.

Taking a deeper look, we can see the user starts having a downward trend on cycle day 9. Her lowest result occurs during her fertile window on cycle day 14. Ovulation was thought to occur sometime between cycle day 14 and 15. After ovulation, her values remain elevated for at least three days again suggesting ovulation has occurred.   

kegg’s intended purpose is to help user’s identify their fertile window for conception purposes. This user decided to not try to conceive this cycle, and only  track her fertility for wellness and informational purposes.

Use-Case: stressed user, neglecting water intake
Ovulation: Cycle Day 9
Fertile Window: 6-10 (difficult to determine due to late kegg use post-period)

While we are aware that many factors can influence our cycles, electrolytes, and kegg results, it is fascinating to be able to see this in the form of a kegg chart! This user reports that she was significantly stressed during this cycle. She reports that she was not drinking water and this appeared to significantly impact her kegg electrolyte levels. As we know, dehydration can impact both electrolytes and our cervical mucus. Below you will see the user’s kegg data charted in green, and her Tempdrop temperatures plotted in purple. While her temperatures still follow a logical trend, her kegg data appears a bit chaotic! In addition, on cycle day 15, the user had unprotected sex close to the kegg testing time, resulting in a low value on that day. Again, please note that kegg should note be used within 8 hours of sexual intercourse as it impacts the kegg reading. As a result, it is very difficult to draw conclusions from this user’s kegg data which were negatively influenced by stress,dehydration, and sex close to testing with kegg. Be sure to stay hydrated!

Use-Case: Temps and kegg
Ovulation: Cycle Day 17
Fertile Window: Cycle Day 14-18

This is the first cycle with kegg for this user. This chart demonstrates how kegg requires at least one full cycle to get to learn your trends. As you can see the fertile window prediction is a bit early, as the kegg does not have previous cycles worth of values to use in its predictions. Instead, it has to rely on your cycle length only for this prediction. After the first cycle, kegg is able to use the kegg method for its predictions. A keen observer, will see that starting on cycle day 13, this user begins to see a decline in values, signifying that she is about to enter the fertile window. As you can see, her lowest value occurs on cycle day 17, which is followed by a steep rise that was sustained for at least three days, so we can predict it was the completion of her fertile window and she ovulated on cycle day 17.

Use-Case: Post-Partum, Long Cycle
Ovulation: Cycle Day 49
Fertile Window: Cycle Days 45-49


This user is in the postpartum period, and continues to breastfeed. As you can see, she has a small dip beginning on cycle day 17, followed by three elevated values (see blue, handwritten notes). When hormones are still in-flux in the postpartum and breastfeeding period, it can be challenging to predict when your fertile window begins. This user was fortunate that kegg spotted this. Had she used a Proov test after cycle day 49, she could have confirmed ovulation, and would know that she would likely get her period about two weeks after that. In the luteal phase, it is typical to see declining values which do not signify the fertile window, based on the timing in the cycle.


Please note, kegg has not been tested to be used in the postpartum period. For regular cycles, kegg’s algorithm allows for accurate predictions. During the postpartum and breastfeeding period, hormone levels fluctuate and the menstrual cycle is often irregular. If you decide to use kegg to monitor your fertility during the postpartum period, we recommend waiting until the second consecutive period after you stopped breastfeeding before starting to use kegg.


If you use any type of Fertility awareness-based method that includes tracking cervical mucus, then you can use the selected FABM postpartum protocol and compare your kegg data with your observations. kegg is a fertility tracker and it is not recommended to be used as a contraceptive tool.

Interested in having your chart reviewed? Email us at hello@kegg.tech.

Haven’t purchased your kegg yet? You’re in luck! For a limited time, get your kegg for the low price of $199 (instead of $275!) by using code tempdrop75 at www.kegg.tech. Hurry though-this offer expires October 31, 2020. kegg is FSA/HSA eligible.

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