An Honest Review of Fitbit for Menstrual Cycle Tracking

You may know that the Fitbit app has some built in menstrual cycle tracking features, but many people do not know that it has other features that may be useful for menstrual cycle tracking. In this article, I will review the pros and cons of the Fitbit app as it relates to cycle tracking for people who ovulate. For context, I use a Fitbit Charge III.

The most basic feature that Fitbit offers for cycle tracking is recording bleeding dates of menstruation and then displaying a predicted fertile window based on average cycle length.

The pink bar represents the length of menstruation. The blue bar represents a predicted fertile window. The flower symbol represents predicted ovulation.

The user needs to remember to input menstuation each cycle. Once it is inputted, Fitbit will generate the blue fertile window. This fertile window should NOT be used for avoiding pregnancy, as it is only based on cycle length and not real-time fertility signs like cervical mucus or basal body temperature.

Once menstruation is entered, it will also begin a countdown until your next predicted menstrual cycle.

Countdown until menstruation in the app.

Unfortunately, I do not find this basic feature very useful for anyone who has any cycle variation. Even though my cycle length has increased over the last year, Fitbit has not automatically updated my cycle lengths. The app does not appear to be very adaptive without user input.

In addition to tracking bleeding the app offers options for:

  • Mood
  • Plan B (morning after)
  • Ovulation tests (better called luteinizing hormone tests)
  • Cervical mucus (Taking Charge of Your Fertility categories)
  • Cyclical symptoms like acne

It is rather disappointing that the app does not include options to mark pregnancy when it occurs, especially since we know that this changes daily calories burned and heart rate, to name just two effected areas of the app.

A really cool feature that I do like is the ability to show cycle trends like flow intensity and cramps. The same screen that displays this will also let you scroll through all past cycle lengths.

In the settings of this screen, you can also decide to toggle off predictions. For people avoiding pregnancy, I do recommend either ignoring or toggling off predictions in the Fitbit app. The app allows you to choose your current birth control method as well.

Outside of the designed menstrual cycle tracking features, I want to highlight resting heart rate as a potential exciting thing to track for those who are not taking hormonal contraception. Why do you need to not be taking hormonal contraception to utilize the heart rate feature for menstrual cycle tracking? Hormonal contraception suppresses ovulation, and ovulation changes our heart rate charts!

To learn more about resting heart rate and the menstrual cycle, read my previous post here.

You can see my heart rate falling during menstruation around April 10th, and then rise during my fertile window and luteal phase.
Menstruation began when my heart rate dipped below 70 on this chart. Ovulation likely occured around the third raised heart rate in this close-up.

Heart rate in people who are ovulating is at its lowest point during menstruation, rises during the fertile window, and continues to be elevated in the luteal phase.

When heart rate begins to drop again, this is an excellent way to predict menstruation will soon occur. For example, I have been tracking my heart rate in Fitbit for 2 years, and I always bleed when my heart rate dips back down to 70 beats per minute after my luteal phase!

I do think this feature is worth tracking for anyone interested in a more precise period prediction than cycle length. If you have Fitbit premium, you can also find a setting for sleeping heart rate under restoration. This may be more steady than resting heart rate for some individuals.

Lastly, I want to address Fitbit temperature for menstrual cycle tracking. Unfortunately, wrist temperatures are not a compatible parameter for fertility awareness when it comes to avoiding or achieving pregnancy. It can be incredibly erratic. When we track temperature, we want the temperature as closest to the core as possible.

Fitbit does not give precise temperatures, instead it gives deviations from a range. I likely ovulated near 18, 19, or 20 on the photo above. While Fitbit did detect a slight shift, it is not particularly clear, and it dropped back down.

As depicted above, my luteal phase the previous month was extremely undefined, and I could not determine a confirmed temperature shift with it.

For now, I do not recommend Fitbit for precise temperature tracking. Instead, I recommend a basal body thermometer.

Conclusion

Fitbit offers some really unique options for cycle tracking, but it should not replace your birth control or fertility awareness method. The heart rate feature may be useful for identifying cycle phases, but the temperature readings are not suitable for tracking cycle phases.

A Dive Into Resting Heart Rate and the Menstrual Cycle

I purchased a Fitbit device close to two years ago, and within months I noticed that my heart rate appeared to be correlating with the phases of my cycle. Now eighteen cycles into comparing my heart rate to other fertility signs, I can say with confidence that it has lined up every cycle. This shouldn’t be too surprising because we already know that progesterone causes basal body temperature to rise, but heart rate does not exactly follow that pattern.

We have known about the possible connection between heart rate and the menstrual cycle for over a century, but in the last 50 years a few studies have taken a closer look.

Palmero (1991) studied 64 women for 3 consecutive months and created a PMS group versus a non-PMS group. They found that “in the premenstrual phase, PMS group showed significantly higher resting HR levels than NPMS group.”

Moran (2000) followed 26 women and found that “resting-heart rate was significantly higher in both ovulatory (P < 0.01) and luteal (P < 0.01) phases than in the menstrual and follicular phases.”

Shilaih (2017) followed 91 women and found that they “observed a significant increase in pulse rate (PR) during the fertile window compared to the menstrual phase (2.1 beat-per-minute, p < 0.01). Moreover, PR during the mid-luteal phase was also significantly elevated compared to the fertile window (1.8 beat-per-minute, p < 0.01), and the menstrual phase (3.8 beat-per-minute, p < 0.01).”

I want to highlight these last two studies in particular, because many of the other studies have an issue. Marco Altino explains why:

“The great majority of studies looking at HRV and the menstrual cycle collected one single data point during the follicular phase and one single data point during the luteal phase. I don’t have to tell you how little sense that makes, considering the high day to day variability in these parameters.”

This is an excerpt from his blog on heart rate variability in the menstrual cycle. Read the full blog here.

The 2017 study published in Nature by Shilaih, et al found that heart rate may rise up to 5 days before ovulation occurs. This means that heart rate could potentially be a used as a way to time intercourse for conception.

My results are so steady with resting heart rate that I dream of someone using it in a long-term study with other fertility signs. Wouldn’t it be cool if we could avoid pregnancy using heart rate too?

Below is an example of my results with resting heart rate. To convert my heart rate to fit in a fertility awareness app, I use a conversion. Essentially, one heart rate beat = .1 Farenheit change on my temperature scale. A heartbeat of 69 becomes 96.9, 70 becomes 97.0, 71 becomes 97.1 This preserves the original ratio, and it allows me to show the data with other fertility signs. For your own conversion, you may model this. If you have a lower heart beat rate, you can still convert, but you may need to do an additional equation.

My resting heart rate rose during the most fertile days of the cycle. Ovulation most likely occured on Cycle Day 15 or Cycle Day 16 on this chart. In addition, while I have not found evidence of this in the literature, I have observed that I tend to get a one day rise 3 to 4 days before the fertile window opens with cervical mucus. On this chart, that was Cycle Day 6.
A second example. Ovulation most likely occured on Cycle Day 14, 15 or 16. Heart rate rose on Cycle Day 14.

In conclusion, I believe that resting heart rate is a very unique sign to track, especially if you already use a wearable fitness tracker. I will note that a false heart rate rise can be caused by illness, alcohol or food close to bedtime, nightmares, and more! This is not dissimilar to what can obscure a temperature. I hope that in the future more studies are done so that we can see if heart rate can also be used for avoiding pregnancy purposes.

Selected Heart Rate Study Citations

Moran, V. H., Leathard, H. L., & Coley, J. (2000). Cardiovascular functioning during the menstrual cycle. Clinical physiology (Oxford, England)20(6), 496–504. https://doi.org/10.1046/j.1365-2281.2000.00285.x

Palmero, F., Choliz, M. Resting heart rate (HR) in women with and without premenstrual symptoms (PMS). J Behav Med 14, 125–139 (1991). https://doi.org/10.1007/BF00846175

Shilaih, M., Clerck, V., Falco, L. et al. Pulse Rate Measurement During Sleep Using Wearable Sensors, and its Correlation with the Menstrual Cycle Phases, A Prospective Observational Study. Sci Rep 7, 1294 (2017). https://doi.org/10.1038/s41598-017-01433-9

A Day in the Life of a Marquette User

Have you ever wondered what it was like to chart with the Marquette Method? This blog attempts to give an overview of what it is like to chart with the Marquette method (monitor/hormones only) for one cycle. Since I am in regular cycles, this is only an overview of what that looks like. Postpartum charting involves a whole lot more testing!

Day 1: Record Heavy Bleeding.

(This is an available day for safe sex based on my Marquette calculation rule. Marquette calculation rules rely on the earliest peak in the last 6 cycles minus 6. For me, this is Day 7, with Day 8 being automatically the first “unsafe” possibly fertile day. Any time of day is allowed within Marquette calculation rules).

Day 2: Record Heavy Bleeding.

Day 3: Record Heavy Bleeding.

Day 4: Record Medium Bleeding.

Day 5: Record Medium bleeding.

Day 6: Do absolutely nothing! My testing window opens on Day 8.

Day 7. Do absolutely nothing! My testing window opens on Day 8. This is my last day to have sex pre-ovulatory per the rules of the method.

Day 8: I wake up at 6:30am, pee in a cup, dip the stick for 15 seconds, and wait 5 minutes for the Clearblue Monitor to read my test. I get a “L” or low estrogen reading. The Clearblue monitor reads both estrogen and luteinizing hormones.

In Marquette, you set a 6 hour testing window to take your test in that is determined at the beginning of each cycle when you trigger a new cycle start date on the monitor. I usually do my tests with first morning urine when my alarm goes off, but I could do it later in my testing window if I desired.

Day 9: I wake up at 6:30am, pee in a cup, dip the stick for 15 seconds, and wait 5 minutes for the Clearblue Monitor to read my test. I get a “L.”

Day 10: I wake up at 6:30am, pee in a cup, dip the stick for 15 seconds, and wait 5 minutes for the Clearblue Monitor to read my test. I get a “L”

Day 11: I wake up at 6:30am, pee in a cup, dip the stick for 15 seconds, and wait 5 minutes for the Clearblue Monitor to read my test. I get a “H” or high estrogen reading. This means that my real fertile window is likely opening and ovulation could be around the corner.

Day 12: I wake up at 6:30am, pee in a cup, dip the stick for 15 seconds, and wait 5 minutes for the Clearblue Monitor to read my test. I get a “H.”

Day 13: I wake up at 6:30am, pee in a cup, dip the stick for 15 seconds, and wait 5 minutes for the Clearblue Monitor to read my test. I get a “H.” Based on having high quality mucus (which is not required to notice for monitor only), I crosscheck with a LH test because I know ovulation is likely approaching soon.

Day 14: I wake up at 6:30am, pee in a cup, dip the stick for 15 seconds, and wait 5 minutes for the Clearblue Monitor to read my test. I get a “P.” This means the monitor has now detected my LH surge. I crosscheck this same urine with another LH cheapie test, and it is also positive.

This means I have peaked for the cycle! All other readings after the “P” are automatic, and I do not have to take any other tests. Marquette requires me to meet PPHLL before resuming intercourse on the day after the second L.

At this point, if I desired, I could be done charting for the whole cycle! This means that I only had to really chart for approximately 7 days this cycle. How easy is that?!

If I desire, I could also take a Proov progesterone test around the second L at the end of my count. This would provide proof that the hormone progesterone has taken over.

Close up of a Body Literacy Collective “Read Your Body” chart with Marquette markings.

Some of the downsides to this method could be:

  • The Monitor missing peak (happens in up to 10% of cycles and many people crosscheck with LH for this reason, or even add temperatures or Proov)
  • The Monitor will not tell you if you are going to ovulate early. The only way to detect earlier ovulation is to track cervical mucus very carefully.
  • The sticks are approximately $1.50 each. This could get very pricey for delayed ovulation!
  • The method may not be appropriate for people with very irregular cycles or elevated LH levels (some PCOS users may have elevated LH).

I personally crosscheck my monitor with Billings Method observations and Proov tests. You can read about charting with Billings here.

Disclaimer: Do not try to learn how to chart from this post. Everyone has their own unique cycle and this is just an example of charting with Marquette in a regular cycle. I recommend finding an official Marquette teacher here. Because the Marquette method uses the Clearblue monitor which is designed for trying to conceive, you will need to get instructions to use this monitor for avoiding pregnancy.

One Cycle Seven Ways: Experimenting with Marquette (Clearblue Monitor), Billings Method, Sympto-Thermal, Daysy, Kegg, DOT, and more!

Over the last several months, I have been testing multiple femtech products (such as Daysy Fertility Tracker, Kegg, DOT) and comparing them to charting methods like Marquette, Billings Ovulation Method, and Sympto-Thermal (NFPTA). These products and methods rely on different fertility signs such as basal body temperature, cervical mucus, urinary hormones, electrolyte levels, and calendar dates.

Disclaimer: Do not attempt to learn to chart using this post. My own experience may not reflect your unique cycles. My fertility intentions may not be your intentions.

Keep in mind that different methods may change safe days over time. The following data is only a snap shot of what fertility windows for avoiding pregnancy could look like. In particular, the Daysy thermometer only has 4 cycles of data on me.

Expected Consecutive Abstinence Over 3 Cycles

Cycle 52

  • Billings Ovulation Method: 15 (9 consecutive)
  • Marquette: 13
  • Sympto-thermal: 16
  • DOT: 12
  • Daysy: 15

Cycle 53

  • Billings Ovulation Method: 14 (8 consecutive)
  • Marquette: 13
  • Sympto-thermal: 13
  • DOT: 12
  • Daysy: 14

Cycle 54

  • Billings Ovulation Method: 16 (9 consecutive)
  • Marquette: 15
  • Sympto-thermal: 19
  • DOT: 12 (EXTREMELY RISKY)
  • Daysy: 15

From this data, you can see that sometimes the amount of expected abstinence does not differ from method to method, and sometimes it differs a whole lot! On my last cycle with DOT, it ended my avoidance window on the day after peak fertility occured. Fertility is still potentially high on the 3 days following this date.

Billings method almost always had the least consecutive abstinence because it relies on real-time fertility signs to open the window. However, because it rejects calculation rules and relies on one primary sign, only alternative evenings are ever allowed for pre-ovulatory sex. In addition, heavy days of menstruation are not allowed due to the possibility of early ovulation, and the bleeding obscuring the opening of the fertile window.

Other methods like Daysy, Sympto-thermal, DOT, and Marquette do allow pre-ovulatory consecutive sex, but most of that falls during menstruation for my cycle ranges (25 to 30 days).

Whatever method works best for someone is very dependent on their lifestyle and what someone is willing to diligently track.

The Same Chart Seven Ways

The highlighted days represent days to not use in order to avoid pregnancy with these methods.

My hearts are left on to show the fertile window and for authenticity. Do not use these charts to try to learn the rules of any method or to determine when sex is safe. You will see some broken rules based on my own personal intention level and on the fact that not all fertility signs will show the same window.

The Billings Ovulation Method draws the fertile window based on vulva sensation and cervical mucus. Any heavy bleeding is considered potentially fertile because it obscures readings and ovulation can always happen early. It requires alternating evenings for sex during the established basic infertile pattern.
This is the Marquette Method while using only urinary hormones and calculation rules. Fertile window opening determined by calculation rule based on last 6 cycles or first “H” reading on the Clearblue monitor. Clearblue measures estrogen and luteinizing hormone. My first window is also closed by a progesterone test in addition to meeting PPHLL rules.
This is the double-check sympto-thermal method per Natural Family Planning Teachers Association (NFPTA) rules. It opens the fertile window based on the shortest cycle in the last year minus 20. It closes the fertile window based on cervical mucus and basal body temperature.
This is a chart with the Daysy Fertility Tracker. This basal body thermometer learns your patterns over time and opens the fertile window based on past cycle data. The fertile window changes with time, and this is technically my 3rd Daysy cycle. Caution days and Red X days are for avoiding intercourse. Daysy does not allow the user to mark temperatures questionable, but I have marked two days questionable because I drank alcohol or had the heater on.
This example chart includes my cervical mucus notes for more context. DOT is a calendar based method that looks at the last 12 cycles of data. Only people in regular cycles can use DOT. Black moons are days available for intercourse based on the calendar method. In the next line, I also have included Kegg. Kegg predicts ovulation for trying to conceive purposes only, so I am including it as a bonus comparison. By reading the electrolyte levels in my cervical mucus, it determined that these 3 days were the most fertile days of the cycle. A full Kegg review is forthcoming in December 2020.
This is a resting heart rate chart. Resting heart rate has been shown to correlate with the menstrual cycle. I convert my heart rate like this: 69 = 96.9, 70 =97.0, 71 = 97.1, etc to be able to fit it onto the graph. You can see that it very closely followed my ovulatory pattern.
Here is my chart with all the data in one. It is so cool how different fertility signs draw the fertile window!

Unfortunately, my Mira Fertility sticks were flawed, so I had to remove that data from this experiment. In the future, I will do a comparison post also using this device. I am currently still testing the Kegg device, and a review with full Kegg charts is forthcoming in December. Kegg cannot be converted to display on the Read Your Body app, so I could only include the fertile days in this post.

Do you have any questions about all of these methods?

Consider coming to my free Instagram Live on femtech on November 28th. You can find me @chartyourfertility.

On December 12th, I’m offering a “pay what you can” introduction session that is minimum $5 to $30 USD on regular FABM methods and what the main differences are. Reach out to me if you would like to come.

Finally, a special shout to the Body Literacy Collective and the Read Your Body app for making this post possible by creating the most versatile charting app on the market!

Why You Should Be Cautious About Calendar-Based Methods (Daysy, Natural Cycles, DOT)

Calendar methods get a really bad rap in the fertility awareness communities. A lot of this is for a very good reason. When the calendar rhythm method was discovered in the 1930s, it was revolutionary. However, since then, we have discovered real-time fertility signs such as cervical mucus, basal body temperature, and urinary testing.

To illustrate why calendar-based rules can be both risky and occasionally line up with real-time signs, I charted with three calendar-based methods for opening the fertile window versus a method with real-time fertility signs only (specifically I used the Billings Ovulation method for my real-time method).

In the first line, you will see the Natural Cycles method. This method relies on basal body temperature as its only required real-time sign. Unfortunately, basal body temperature can only tell you when your fertile window closes, not when it opens. Temperature has no predictive qualities for letting you know if you are going to ovulate at a different time than normal.**

With only 3 cycles of my previous data, Natural Cycles gave me until day 8 as safe for this cycle. What Natural Cycles doesn’t know is that my cycles range from 24 to 30 days long over a calendar year. For this reason, it can be quite risky some cycles for me to be allowed safe sex until day 8. The fact that this cycle happened to line up is merely a coincidence! This coincidence can cause a confirmation bias when people use this app and do not get pregnant. If you are seriously avoiding, be wary of any method that doesn’t allow you to crosscheck the opening of your fertile window.

Natural Cycle also closed my fertile window in an incredibly risky manner. It told me I was safe on the morning after my real-time sign of “peak” day. In fertility awareness based methods, “peak” is the highest level of fertility you can get in a cycle. The two days following Peak day also have a significant chance of ovulation occurring. Every time I have used Natural Cycles (here is my previous try with it last year), it gives me a very risky closing to the fertile window.

Here is my full chart from Natural Cycles this time:

Natural Cycles app

Next up on the chart above illustrating my safe days is the Daysy thermometer. Daysy is a thermometer that relies on calendar based rules and potentially earliest temperature shift based rules to open the fertile window. In my two experiences with Daysy, it has been much more conservative than Natural Cycles. Daysy does learn over time, so it is possible I could have a risky day with it in the future, but so far I have not had any risky days with Daysy.

You can see in the image above that Daysy confirmed ovulation last out of all of the methods. I believe this is because my temperature shift was a bit erratic and because the device does not allow the user to mark temperatures questionable (I had two that were marked questionable for my own manual interpretation).

Daysy does not rely on anything except cycle length and temperature shift timing to open the fertile window. For this reason, Daysy can be risky if you ever have a very early ovulation. It can also be risky if the user is not careful about only taking their temperature when it is not disturbed, or if the device misreads a temperature shift. In my experience, Daysy tends to be much more cautious than Natural Cycles.

Daysy Chart

My third line is a true calendar only method. DOT has over a year of my data; however, the prediction has only given me one extra safe day during my whole use of the app. DOT is entirely based on the calendar method. However, interestingly DOT got higher efficacy than Natural Cycles in their study. Here is my DOT chart below

While I do not recommend the calendar method to most charters, this app can be useful for period prediction or for birth control if you are okay with an unintended pregnancy if you were to suddenly have a longer or shorter cycle. Users for DOT must have no more than 8 days variation in their cycle per calendar year.

In the example above, DOT actually gave me no risky days whatsoever. Again, this is a coincidence that it seemingly lined up with other signs. At any time, cycles can always change.

DOT the app

Finally, my main method is the Billings Ovulation Method. Billings relies only on real-time fertility signs. This means that they reject any calendar-based thinking, including the idea that menstruation is automatically safe. My Billings chart was based on when cervical mucus opened the fertile window (cervical mucus is what helps sperm survive) and when cervical mucus peak rules closed the window (when sperm can no longer access the cervix because ovulation is over and the cervical mucus plug has closed).

I always recommend real-time fertility signs to anyone who wants very high efficacy, the least amount of consecutive abstinence, who may be in regular or irregular cycles, and who want to understand their body and their health on a more deeper level. Here is an example of a Billings method chart. The babies represent possibly fertile days.

Conclusion:

I hope this post helps you think critically about whether calendar-based methods for opening the fertile window are right for you!

Here is a breakdown of efficacy for these methods:

Daysy: Claims 99.4% perfect use, but their study was retracted.

Natural Cycles: 98% perfect use, 93% typical use.

DOT app: 99% perfect use, 95% typical use.

Billings Method: 97.8 to 100% perfect use, typical use varies depending on country.

**Some modern fertility awareness methods use the Doering Rule to set the opening of the fertile window. This can be very safe and yield high efficacy. Doering is based on the earliest temperature shift of all time (not just the last year).

An Honest Review of Proov PdG Tests

Are you interested in testing your PdG at home with Proov?

Proov tests check levels of the hormone metabolite PdG in the urine. Proov tests are an FDA approved product. People who are ovulating produce the hormone progesterone after ovulation. If you are a fertility awareness charter, you can use these tests to double check that ovulation has occurred along with your other fertility signs. If you are seeking to become pregnant, you can use these tests to help see if your luteal phase is sufficient to support a pregnancy.

Here are a few links on recent studies so that you can be more informed about using this product:

Proov is Clinically Validated

Study on Urinary Hormones and Progesterone

Study on Proov Combined with Fertility Awareness Methods

Study on Combining Proov with Clearblue

I have personally been using Proov for over a year and a half now. It is a regular part of my fertility awareness routine that I use to avoid pregnancy.

This is my Read Your Body chart. The yellow plus signs are for LH (luteinizing hormone) positives. The blue plus sign is for Proov test positives. On this chart, I got a positive LH (luteinizing hormone test) on Day 18 and a positive Proov test on Day 21.

My most common day to get my first positive Proov is approximately 3 to 5 days after a positive LH test. I love having Proov as a crosscheck so that I can have an extra way to confirm ovulation. I like having a ton of data in my fertility awareness routine. While there is currently no official protocol for confirming with Proov tests (outside of Marquette method tentative guidelines), you can use them as a part of your fertility awareness routine regardless of your intentions. You should still rely on the fertility signs in your method rules while using Proov.

For those trying to conceive, the tests can be used around 7 to 10 days post ovulation (counting from peak day, temperature shift, or positive LH depending on what you are charting). If the tests are positive, this is a good sign that your progesterone is high enough when implantation is most likely.

I used it 7 to 10 days past my first positive ovulation test to see if my progesterone levels were high enough in the last part of my cycle. Ideally, for conception purposes, you want to see positive Proov tests on days 7 through 10.

These tests are also useful for people with irregular cycles or tough cervical mucus patterns because they can help you know if you have indeed ovulated.

Proov also has an app that can help you read your tests, including LH tests. It recently updated to include numeric values. This makes the data even more meaningful! Some people struggle reading Proov, and the app is definitely useful for those people.

I highly recommend trying Proov if you are curious about your progesterone! For now, I have decided to make Proov a permanent part of my avoiding pregnancy fertility awareness routine.

Want to try Proov after reading my review? Please use the promo code chartyourfertility for 30% off!

Thank you!

Embracing Our Bodies with Fertility Awareness

In contrast to hormonal birth control, fertility awareness asks us to change nothing about our bodies. There are no harmful side effects, but there is the beneficial side effect of actually ovulating.

Ovulation is good for your health, and I believe that we as women have the #righttoovulate

Fertility awareness teaches us how our bodies work so that we can modify our behavior rather than our biology. Hormonal birth control changes how our bodies work, FAM teaches us how our bodies work.

I strongly believe that fertility awareness teaches us the value of self-control. We learn that unprotected sex at all times is not necessary for a healthy relationship.

For those not abstaining in the fertile window for religious reasons, I also think it changes the generally very heteronormative view of sex and opens us up to new kinds of love and touching in the fertile window. And of course, if choose to abstain, there is room for emotional love during this time as well

If you are ready to take the plunge into FAM, I am now accepting clients for an asynchronous course with 3 cycles of help from myself. Sign up on my learn with me page or send me an email.

An Honest Review of Pearl Fertility Kit

I tried the Pearl Fertility Kit. During my first kit, I got a little confused when the kit did not seem to line up with my fertility signs. However, I contacted Pearl Fertility and they were super helpful. They sent me another kit for free, and it worked perfectly when I tried it this last cycle.

Pearl is a product marketing to women who are trying to conceive (TTC). The product explicitly states that it should not be used to avoid pregnancy. The kit contained 15 follicle stimulating hormone (FSH) strips, 15 luteinizing hormone (LH) strips, and 4 progesterone (PdG) strips. It also included a few pink dye pregnancy tests. As I am not currently trying to conceive, I did not use these.

The app claims to open a woman’s fertile window by scanning the FSH and LH strips and giving you a fertility window from these results.

If anyone wants to try this product, I highly suggest tracking your cervical mucus, as good quality cervical mucus (eggwhite, clear, stretchy, wet) is what allows sperm to survive to meet an egg. Progesterone tests need not be used until at least 4 days past your peak day (the last day of good quality cervical mucus). Even then, some women do not see positive progesterone tests until as late as 7-10 days past ovulation. For more information, visit Proov’s website linked at the end of this article. By charting your real fertility signs, you could use these tests more wisely.

Overall, I thought the Pearl Fertility Kit was super cool. FSH strips are a brand new thing, and I have high hopes for them being integrated into a real fertility awareness based method in the future. If you have the money to invest in Pearl, this can be a fun kit to experiment with. Basically you get to see three main hormones of the menstrual cycle play out. Pearl graphs them for you.

If you cannot afford Pearl, do remember that it is free to chart cervical mucus and that this is always the best indicator for when to have sex when trying to achieve pregnancy. Without cervical mucus, sperm will never make it to the egg on its own.

Here is what my Pearl chart for this month looks like:

The highest pink dot is my positive LH strip.

Here is my Pearl information compared to my symptothermal method chart. In this chart, FSH equals Ferning since Kindara does not have an FSH category.

The Pearl fertile window is indicated by the green lights. It did start my fertile window on a day pregnancy was unlikely since there was no mucus. The blue hearts represent the fertile mucus where sperm can survive. These two fertile windows lined up pretty well.

Overall, I would rate myself satisfied with this kit.

One tip:

From the calendar screen, you can override what tests Pearl is asking for. I only suggest doing this if you are charting your other fertility signs (cervical mucus and basal body temperature) and know that something is not lining up right.

In addition to the strips, Pearl has spaces to track intercourse, your period, and pregnancy status.

Curious to know more about the fertility signs?

If you want to learn how to chart your real fertility signs to achieve or avoid pregnancy, read my guide to getting started.

Look for my next blog on using Proov progesterone tests.

Now Opening Enrollment For December 2019 Fertility Awareness Course

I am so excited to be offering this new course for those interested in learning the symptothermal method of fertility awareness. The method I teach is based on the rules studies by Sensiplan. You can read about this study here.

I found fertility awareness after 7 years on the pill, and it really rocked my world. When I started practicing it myself, I realized that it was a grave injustice that women are not taught about FAM. Practicing FAM has put me in touch with my body more than ever before. It healed some of the mind/body split that I had developed through years of resenting my period.

Moderating in Fertility Awareness Method of Birth Control, the largest English speaking, secular fertility awareness group on Facebook at 25,000+ members, lead me to becoming a certified instructor through the Natural Family Planning Teachers Association (NFPTA). Starting in February 2020, I am pursuing a certification through Bebo Mia as a fertility doula to support women who are TTC. Outside of the fertility world, I am training to be a librarian. I have taught at the college level since 2016.

I teach a secular form of fertility awareness including information on barrier methods (condoms, diaphragms, etc). The NFPTA method has the same temperature rules as Sensiplan. I teach cervical mucus, cervical position, basal body temperature, and calculation rules (the doering rule and minus 20 and 21 rules). My distance course is offered on Moodle. It is a 4-week self-paced course that includes video charting examples and information on charting during all life circumstances (perimenopause, postpartum, postpill, and TTC). This class opens in December. Your partner is welcome to ask me questions and take the course along with you.

If you already have charting experience from reading TCOYF or the Sensiplan file (3 or more complete cycles), I will extend a discount to you if you decide to work with me. Reach out to me to find out more. I will also likely be holding a live introduction to FAM session in early December.

The best way to get in touch with me is through DM on my Instagram @chartyourfertility or through e-mail by completing a form on chartyourfertility.com. You can also follow me @chartyourfertility on Facebook

A symptothermal method chart
An Example of Symptothermal Method Chart on Kindara

*Disclaimer: These methods only work as well as the user. Even with perfect use, there is still a .4% chance of pregnancy. Using a calculation rule is built into the efficacy, and ignoring calculations may result in unintended pregnancy. I will work closely with you so that you understand the rules, but it is ultimately on the user to follow them.

Shortcut charting, or “Wait… I don’t have to take my temperature every day?”

Many people come into FAM overwhelmed by all the data that they have to collect daily. It can be a bit of a turn off for those new to the method. They may wonder why they have to check their cervical mucus ALL day and then set an alarm on top of that.

When you first begin charting, it is vitally important to try to get the information down every day so that you can get into a habit and make sure that you are following the rules. Missing information will leave you with less complete charts that could leave you confused as to whether ovulation is confirmed or not.

However, once you have been charting for a significant amount of time and become confident, you can stop recording fertility signs once you have confirmed ovulation.

I am headed into chart number twenty-two successfully avoiding pregnancy with FAM, and I have been shortcut charting most of the time for about seven cycles now. I personally recommend confirming ovulation in 12 cycles before shortcut charting. This is so that you know how early you ovulate, your normal temperature levels, and how to tell whether something abnormal is going on in your cycle (ie sickness causing temperatures to be higher than normal or an abnormal cervical fluid dry up due to cold meds or some other medication).

Toni Weschler, author of Taking Charge of Your Fertility, recommends that women have several months of experience in the standard rules before taking any shortcuts. She offers some modified guidelines to follow and emphasizes that “contraceptive efficacy won’t be compromised as long as both your fertility signs have confirmed that ovulation has already been confirmed for that particular cycle.”

The Modified Rules

Temperature Taking

  1. You don’t have to take your temperature during your period. Toni explains that these temps may be unreliable anyways. However, if you have short cycles with early ovulation, you may need those temps in order to confirm ovulation. If you have a temperature shift CD12 or sooner, you will need some period temps in order to have enough temperatures to draw a coverline.
  2. You don’t have to take your temperature after you confirm ovulation with temperature rules. This means at least 3 high temperatures with a standard shift. If you have weak shift or a fall back rise, you must have the extra temperatures needed to fulfill those rules before you stop taking your temperature. Some people take their temperature again a day or two before they expect their period since it can (but not always) give an indication that menstruation is approaching.

Cervical Mucus

  1. You don’t have to check cervical mucus after you confirm ovulation. You will need to check until you meet peak rules (P + 3) and crosscheck this with 3 high temperatures before you can stop checking for cervical mucus. Again, if you have a weak shift or fallback, you will need to check until you meet the rules.
  2. From the day after your period until the day you observe peak type fluid, you should check cervical mucus continuously throughout the day and follow all rules for mucus checks. However, you don’t have to check cervical mucus multiple times a day once you observe peak fluid. If you observe peak fluid first thing in the morning, there is no need to keep checking. You have already recorded your most fertile observation for the day.

Those are the basic changes when short cut charting.

Here is an example chart.

This woman does not take her temperatures during her period. She begins taking her temperature on CD6 when menstruation ends. She checks her cervical mucus multiple times a day and follows the rules for checking until CD11. On CD11, CD12, and CD13, she observes eggwhite mucus first thing in the morning and doesn’t check again. On CD14-CD17, she checks mucus multiple times a day because she knows she needs at least a 3 day dry up (P + 3) to confirm ovulation. On CD 15, she has her temperature shift. CD16 is above the coverline. CD17 confirms ovulation because it is at least .4 F above the coverline. Ovulation is officially confirmed with both peak and temperature rules met. She takes her temperature again on CD26 to see if she gets a temperature drop indicating that her menstruation may begin soon.

People Who May Want to Think Twice about Short Cut Charting

Not everyone is suited to short cut charting.

  • Charting for Health: If you are charting for health, you may want to record your signs every day. Odd cervical mucus patterns and temperatures can indicate health issues. If this is your goal for charting, short cut charting may not be right for you.
  • Using Tempdrop: Tempdrop says to wear the device every day. If you don’t, it could disrupt the algorithm. As far as I know, they do not recommend short cut charting at this time. If you use this device, you may not want to short cut chart if you are worried about being at risk of pregnancy.
  • You aren’t confident in charting: If you are not confident in your ability to chart, you should NOT short cut chart. You should be 100% confident in your abilities before attempting this.
  • You are sick: If you are sick, you may want to chart more diligently and stay protected if you are uncertain about your chart interpretation.
  • You are only charting one sign: You NEED two signs in order to short cut chart. If you pick just one, you may be putting yourself at risk of unintended pregnancy. Ovulation must be confirmed with two signs.