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.

Your Guide To Getting Started With Charting Your Menstrual Cycle

One of the most common questions I get in my inbox is how to get started with the fertility awareness method. This post outlines all the different ways you can learn to chart. First and foremost, I will do a shameless plug for learning with me. My course opens in late September 2019. I will provide you with a materials packet and support for 3 cycles charting. I teach basal body temperature and cervical mucus (cervical position is a bonus sign). I also have postpartum and perimenopausal protocols available. You can find out more about this here.

For anyone who is able to chart multiple signs of fertility (temperature and mucus or temperature and cervix), I do suggest using two signs over using a single sign. This is because if one sign is obscured for some reason, you will still have the second sign to fall back on. In addition, charting temperatures will prevent you from having issues with double peaks. Charting temperatures also allows you to have unprotected sex during menstruation (only if you do not have short cycles); cervical mucus only charting does not allow intercourse on the days of heavy bleeding. The 99.6% perfect use efficacy rate that you may see quoted around is based on charting temperature, cervical mucus, and using a Doering rule to limit dry day usage. You can read more about this study here. STM charting also allows for barrier use in the fertile window, depending on whether you learn from a religious source or not.

However, using a single sign like mucus can be really great for postpartum charting and perimenopausal charting. Mucus only methods can also be used to pinpoint health problems. The method you pick should be based on your fertility intentions and what stage of life you are in. Notably, mucus only methods require abstinence in the fertile window because without abstinence penetrative sex could disturb the mucus sign. I like how this faith-based document explains “Your Right to Know” about multiple fertility signs.

What you will never see me suggest is using a device like Natural Cycles or Daysy to chart temperatures only. Temperature only charting is valid, but you do not need to shell out a bunch of money to do it. Temperature also cannot be relied on to open the fertile window. You need cervical mucus for that. Even if you want to only do temperatures, it will be much cheaper and arguably more effective if you get an instructor and interpret your own data.

First Step: Pick an Instructor

Sympto-Thermal Methods (STM)

Sympto-thermal methods require you to monitor at least two fertility signs. These signs are basal body temperature, cervical mucus, and/or cervical position. You can learn these methods from religious or secular sources.

Religious Organizations Who Teach STM

These methods may include some religious teachings in the text. Usually, this is Catholic teaching based on their theology.

Couple to Couple League USA

Price $135 USD. Both members of a couple can attend. Online options available. Some in person class offerings. Emphasizes abstinence in the fertile window.

SymptoPro USA

Price $110 USD. Online options available. Religious materials may be absent from the course but the organization is pretty open about its religiosity and beliefs. Emphasizes abstinence in the fertile window.

European Institute for Family Life Education

Price will vary widely. This includes information for most of the NFP organizations in Europe that partner with this institute. There is a chance that some of these may have secular teachings, but you would need to contact them to ask. Emphasizes abstinence in the fertile window.

Marquette USA

Price will vary. This method sometimes teaches temperatures in addition to mucus and hormone testing. Emphasizes abstinence in the fertile window.

Sensiplan France, Germany, Slovenia, Netherlands

Price will vary. Instruction available in person and online depending on the country. This is a Catholic organization. Emphasizes abstinence in the fertile window.

Secular Organizations Who Teach STM

Natural Family Planning Teachers Association Based in United Kingdom but teachers are located world wide

Prices will vary. Many teachers work online, but there may be in person classes available. Method does emphasize abstinence from genital to genital contact in the fertile window but no religion is present in the text. (I am certifying through this organization). Barrier method allowance will vary from teacher to teacher.

Justisse Method Based in USA but some teachers world wide

Prices will vary. Many teachers work online, but there may be in person classes available. This method can only be used as mucus only (from my understanding, please do ask a teacher). Barrier methods are allowed.

The Association of Fertility Awareness Professionals USA

Prices will vary. This includes Grace of the Moon and Justisse teachers. May or may not emphasize abstinence in the fertile window.

Fertility Awareness Method of Birth Control Instructor List World Wide

Prices will vary. This list includes teachers from random methods. Most teach online, but a few teach in person. Reach out to one to find out more. May or may not emphasize abstinence in the fertile window.

Mucus Only Methods

Billings Method USA and Woomb Billings Method Australia Likely world wide availability for teachers.

Prices will vary. Abstinence is required in fertile window. Religious in nature (Catholic).

Creighton Method World Wide and USA

Prices will vary. Abstinence is required in fertile window. Religious affiliations but may not be overt in materials. Connected with NaproTechnology doctors and may be a good choice for women with fertility problems.

FEMM USA but teachers are available online

Prices will vary, but can run as cheap as $75. This method includes mucus and LH strips. Abstinence is required in the fertile window. Secular, but the organization does have religious affiliations.

Rhythm Methods

These methods only involve tracking your cycle length. I do not recommend this to anyone who absolutely cannot get pregnant for health reasons or who absolutely does not want to get pregnant in general. If you are okay with the possibility of pregnancy, this may work for you. These methods also require you have to fairly regular cycles. This type of charting should really only be done if for some reason you cannot learn or are not able to track mucus or temperatures. These methods are not good for postpartum or perimenopause.

Dot (Free)

Cycle Beads ($12 USD)

Communities and Self-Teaching

If you plan on self-teaching, I highly recommend joining this community. I am a moderator in this group. I do not recommend self teaching unless you absolutely cannot afford instruction. We have no known efficacy rates for self-teaching; so, it will be sort of “uncharted” territory if you choose to rely on it. The reason I recommend an instructor is because many people do not know what they do not know. Missing key details in a self-teaching manual can result in an unintended pregnancy. If self-teaching, I recommend waiting 12 full cycles before using any dry days. Dry days are one of the easiest things to misinterpret if self-teaching. If you are going to learn, I suggest the book Taking Charge of Your Fertility. This is a single check sympto-thermal method for opening the fertile window, but a double-check for closing the fertile window. This puts it at closer to 98% perfect use and 88-90% typical use. You can see that this is less effective than the other STMs linked above. Check your local library to see if it has listings of the book. Here is a link to WorldCat which you can use to locate a copy near you. Click here to check out Taking Charge of Your Fertility on Archive.org.

Other Free Manuals:

Sympto

NFPTA Fertility Guides

Many people ask if there is a self-teaching manual for mucus only methods. Mucus only methods should not be self-taught. That would be incredibly risky. If you want to do this, select an instructor from the list earlier in this blog.

Second Step: Order a Thermometer and Pick a Way to Chart

Recommendations for Thermometers and Apps

I recommend the iSnow as my favorite basal body thermometer for charting. Whatever you do, make sure you do not have a fever thermometer. These are not suitable for charting. It must be a basal body thermometer. For as slightly cheaper thermometer with a back light and memory, I suggest Easy@Home.

For information on the only wearable basal body thermometer I am willing to suggest, please read this blog post.

For information on charting apps, please read this blog post.

Third Step: Start Charting

While it will take you some time to make the initial investment and learn the method, it takes less than 5 minutes a day to chart once you have learned the rules. Build good habits right away. Check for mucus at every opportunity. I highly suggest taking your temperature after at least 3 hours of sleep at the exact same time when you are first charting. Some people may find that the time they can take their temperature can vary and still give them clear charts, but others will find they need to take it at the same. It takes a few weeks to make a habit. Once you have your routine down, charting will get so much easier.

Why I Do Not Suggest Using Natural Cycles

Natural Cycles costs around $10 a month, or $80 a year. The app claims to be able to tell you when you are and when you aren’t fertile by using basal body temperature (ovulation strips are optional).

This claim is not true. Natural Cycles only has a 93% typical use efficacy rating. After my experience, it seems even lower than that. I used Natural Cycles for 3 cycles and compared it with the sympto-thermal (STM) method that I use. The method I use is 98.2% effective with typical use.

As a long term charter, I use a doering rule (a rule to limit dry days). My last safe day for unprotected sex is day 5 of my cycle (usually the last day of my period) because of this rule. This rule is included in the high efficacy rates of the sympto-thermal method.

The charts that follow show when my method said I was safe versus when Natural cycles told me I was.

I have compiled 3 of my charts for comparison. During more than one cycle, Natural Cycles told me I could have unprotected sex on the day near my PEAK fertility. Peak day is the most likely day of ovulation, while not always the exact day of ovulation. Suffice it to say, the app told me that I could have unprotected sex on a day when pregnancy was still possible.

September Cycle (First with Natural Cycles)

On my very first cycle, without any knowledge of whether I had ovulated the cycle before, Natural Cycles gave me clearance to have unprotected sex during my period.

This is totally wrong. Without having confirmed ovulation the previous cycle, there is no way to know if this bleeding is safe or not.

The next BIG issue is that it told me I could have unprotected sex on the second day of my temperature shift (CD17). There is a huge chance that my egg could have still been viable and hanging at this point.

With the symptothermal method, you CANNOT confirm ovulation before 3 high temperatures.

The chart below has my actual safe days as calculated by doering. (Keeping in mind that I did confirm ovulation the cycle before so my period is safe. However, there is no way that Natural Cycles could have known that).

september 1

October Cycle (Second with Natural Cycles)

late september nc cycle

For the second time, Natural Cycles gives me a green light on the second day of a temperature shift in the morning. My egg could still be around! In fact, this green light was less than 24 hours after my peak day!

october 1 cycle

November Cycle (Third with Natural Cycles)

late october nc cycle

During this cycle, Natural Cycles decides that I’m not safe on CD 5 (I am).

It also gives me a green light on CD20. However, I would not be safe to have unprotected sex until the evening of CD21 due to peak day occurring on the first day of my shift.

oct 27 cycle

Conclusion

Natural Cycles does not follow the rules for STM charting.

When charting with STM, one must always wait until the evening of P + 3 and T +3 (three high temperatures and three days after peak). Both rules have to be met before you can have any unprotected sex. With weaker shifts, this wait can be a day longer.

Natural Cycles does not include cervical mucus. Since cervical mucus is what opens the fertile window (and not temperatures), this causes the method to lose efficacy. Cervical mucus is what allows sperm to survive and fertilize an egg. When cervical mucus dries up for 3 days and 3 high temperatures above the coverline occur, ovulation is confirmed for the cycle. Any app that leaves out cervical mucus, but still lets women have green days pre-ovulation, is misleading women and putting them at extra risk of pregnancy.

Another worrisome aspect of the app is that it frequently gave me a green light on the morning of the second high temperature. Temperatures can easily be disrupted, and new charters may not know their normal temperature ranges. Women need to be certain that ovulation is over before having unprotected sex. The third high temp (along with the third day after peak day) lets you know that ovulation is confirmed. Green lights after only one or two temps can put women at a risk of pregnancy, especially when cervical mucus isn’t taken into consideration. In fact, most STM methods require 4 high temps for women who don’t use cervical mucus (or cervical position). The reason that Natural Cycles may interpret shifts wrong is because of its static coverline. Some women may not see much of a change in coverlines from cycle to cycle. However, others may see a change. Having a static coverline can give users green days before they actually have a temperature shift.

Lastly, the app is misleading because it marks the day of ovulation. The only way to truly determine the exact day of ovulation is with a well-timed ultrasound. In fact, ovulation is most likely to occur over a period of about 4 days. Here is the link to the study that discusses which 4 days are the most likely. Since ovulation is likely up to day 2 of a temperature shift, this proves even further why it is so risky for Natural Cycles to give green lights on day 2 of a shift. In the other 9% of cases not hightlighted in the green box below, ovulation happened up to 3 or 4 days before a shift. This is why mucus is so important to record pre-confirmed ovulation. If there is mucus present, the sperm may live. Natural Cycles does not take enough factors into account when drawing its fertile window.

ovulation


If you are coming off of hormonal birth control or postpartum, this app may be an even worse choice for you. Those coming off hormonal birth control and postpartum may experience cycles changing in length and unexpected early ovulation even more so than people with regular cycles.

Anecdotally, I have seen many risky charts from Natural Cycles in the group I help moderate. You can find a link to this group here.

I highly recommend learning a real sympto-thermal method from an instructor and not wasting your money on the Natural Cycles app. I found it quite shocking that is was not very conservative when first learning about my cycles.

Check out my last post to learn how to start charting on a budget. Click here to sign up to learn to chart with me when my course opens in September 2019.

Here are some other articles on Natural Cycles that I recommend reading:

Natural Cycles’ FDA Approval: What’s The Big Deal?

5 Reasons I Don’t Use Daysy Or Natural Cycles

‘I felt colossally naive’: The Backlash Against the Birth Control App