It’s somewhat embarrassing to admit, but I find it hard to bring fertility awareness up to people in real life who haven’t heard of it before. For me, the awkwardness is their reaction to the name and what they think it entails.
Something about “fertility awareness” evokes something for some folks that is akin to “hippy” or “new age” type of connotations.
On the other end, some folks will think that this term means the calendar method or the rhythm method. This is partially because most people don’t know about the new science of real-time fertility signs. The other reason people think this is because most people who claim to be practicing a fertility awareness method are still doing some kind of bleeding tracking focused method. It’s truly a small percentage of us who are using a evidence-based real-time fertility sign method like Sympto-Hormonal, Sympto-Thermal, or Cervical Mucus only methods.
“Fertility” evokes conception for many folks. It also isn’t the correct word. We can only know if we were truly capable of fertility that cycle retrospectively when a pregnancy occurs, or if the cycle was visibly fertile by counting the luteal phase. I’ve seen a researcher say the correct term might be “fecundity.”
“Awareness” makes me think of some type of campaign. And what does awareness mean?According to the OED, “knowledge or perception of a situation or fact.” This can sound like people are charting with their intuition, but we are not. Fertility awareness modern methods track tangible and measurable fertility signs (cervical mucus, basal body temperature, cervix) or hormone levels.
I also don’t want to tell people that I teach natural family planning. Something about “family planning” makes people assume that the method is only for those who want to conceive, but a part of family planning is avoiding a pregnancy too. Then, there’s the religious connotation. I’m not Catholic, and I don’t just encourage abstinence because of religious compulsion.
Then, there’s the word natural. Natural is an incredibly subjective term. Some folks will see it and think this also means the withdrawal or pull out method. In the context of charting, it does not include withdrawal. According to the OED, one of natural’s meanings is “existing in or caused by nature; not made or caused by humankind.”
With this definition, do urinary hormones methods become “unnatural”? The hormones themselves occur in the human body, but you can only measure them with help from a machine. I’m not arguing against natural family planning including hormone monitors, but I do wonder if it makes sense to use that terminology.
My favorite terminology is “fertility awareness based methods.” Something about the word “based” makes it sound more scientific in my mind. I’ve seen some educators adopt this language to be more inclusive.
I’ve seen Samantha Zipporah talk about “conscious contraception” as a way to classify fertility awareness. I like the term conscious. Something about it sounds more sophisticated than awareness. I’ve seen it used in a few older academic articles. You can read them here and here.
I’ve also seen it called “Natural Fertility Control” or “NFC.” You can read an article with this terminology here. Some people will feel uncomfortable with the term “control.” In some ways, it isn’t control, because there is always a small chance of unintended pregnancy with correct use, and a larger chance of unintended pregnancy with incorrect use. I do think the self-knowledge gives the user a level of control over their choices more than other methods do. After all, with correct use, you will always know when you are possibly fertile, and then can make your decisions accordingly.
Many people think that having sex during menstruation cannot lead to pregnancy, but the answer is much more nuanced than that. It is possible to get pregnant during bleeding episodes, some of which may not be menstruation!
Was the bleeding truly menstruation?
Charting evidence-based fertility signs like cervical mucus, basal body temperature, and urinary tests are the best way to determine if you are ovulating. True menstruation should follow about 10-16 days post ovulation as indicated by a temperature shift or positive PdG test.
If you are not charting your cycle with a fertility awareness based method, your bleeding may not really be menstruation. Estrogen breakthrough bleeding may appear very similar to menstruation and is often indistinguishable without charting. This bleeding can be fertile, and pregnancy could result.
Day one of a true menstruation marks the beginning of the cycle.
How long are your cycles? Better yet, approximately when do you usually ovulate?
If your cycles were 26 days or longer for the last year, it is unlikely you will become pregnant with sex during the first five days of the cycle.
Dr. Josef Roetzer monitored 5,807 cycles. He observed only one pregnancy before day 6 of the cycle. Her cycles were 22-27 days long.
Dr. Roetzer estimates that using the first five/six days is 99.8% effective for avoiding pregnancy. It is important to note that all of his cycles monitored had a temperature shift preceding menstruation. If you do not have proof that you ovulated before a bleed, it becomes more likely to conceive during bleeding.
Another way to determine the last infertile day at the beginning of the cycle is to use Dr. Doering’s rule. Dr. Doering subtracted 7 from the earliest first high temperature in the last year. For example, Sarah’s earliest first high temperature was day 13. Day 13 – 7 = Day 6 as the last infertile day of the cycle. This rule is always crosschecked with cervical mucus. Sperm may survive up to 5 days in cervical mucus, and any presence that has not been determined to be infertile through instruction should open the fertile window. The Doering rule is more personalized than automatically assuming the first five/six days are infertile.
In Dr. Frank-Hermann’s double-check sympto-thermal study from 2007, all three method failures were from day 5 intercourse. This study used the first five day rule and Doering rule. This study yielded an efficacy of 99.6%.
So am I safe to have sex during my period? Ask yourself these questions.
Did you confirm ovulation with basal body temperature, PdG strips, or a blood draw in the previous cycle?
Are your cycles longer than 26 days on average? Have you ever had a peak day before day 13 of the cycle?
If the answer to both of those is yes, you can probably have safe sex up to day 5 of your cycle.
If your answer is no, then you have a possibility of pregnancy.
What if I want to be more conservative?
Some methods like Billings, FEMM, and Creighton suggest not having sex during heavy days of bleeding when cervical mucus cannot be observed.
If you have a history of short cycles (less than 26 days) or want to add an extra layer of protection onto the beginning of the cycle, I recommend beginning observing vulva sensation and cervical mucus as soon as your bleeding has lightened enough to no longer need a tampon, cup, or regular pad. If you need only a panty liner or are only experiencing light spotting, you should beginning checking your cervical mucus and sensation throughout the day. At the end of your day, if you have observed no cervical mucus or sensation outside of your determined infertile pattern, this day is safe for sex. (DO NOT DO THIS WITHOUT LEARNING A METHOD. THIS BLOG IS NOT ENOUGH INFORMATION TO AVOID PREGNANCY WITH ALONE).
What if I bleed for more than 5 days?
If your menstruation lasts longer than five days, you should follow the instructions from the paragraph above. It is NOT safe to consider past day 5 automatically available if you are bleeding. You need proof by using cervical mucus or urinary estrogen tests that your fertile window has not yet opened past day 5 of the cycle.
What if I randomly have a short cycle?
Checking cervical mucus is your best back up. Cervical mucus should appear when the fertile window is opening for most charters. Many methods suggest no longer considering menstruation safe once you enter peri-menopause (can occur up to 10 years before menopause) because cycles may shorten at this time. If you notice that your cycles have grown shorter than 26 days, you may want to become more vigilant and stop automatically considering the first 5 days safe.
For the majority of people menstruating, using the first five days of a true menstrual cycle will not result in pregnancy. For a very small percentage, it may. I recommend charting with a real fertility awareness method (Sensiplan, SymptoPro, FEMM, Billings, Marquette, etc) to determine if your bleeding is actually menstruation!
Boetze, Iosef. “Further Evolution of the Sympto-Thermal Methods.” International Review of Natural Family Planning 1 (1977): 139-150.
During the postpartum period of time, fertility is in a unique state. For those fully breastfeeding, it may be months or years before they begin ovulating again regularly and with fertile cycles. This article talks about some of the data we have on what return of fertility looks like. This information may be of particular interest to those charting with a method of natural family planning or fertility awareness. Charting at this time may be difficult, and for highest efficacy should be done closely with a certified natural family planning educator.
Breastfeeding as Birth Control
Breastfeeding has been shown over numerous studies to have an effect on return to fertility and ovulation. Kennedy et al (1989) reviewed 10 studies from multiple countries to come to a consensus on what full-breastfeeding means.
Fully breastfeeding or at least partially fully breastfeeding
Fully breastfeeding meaning the infant gets all or as close to all as possible of their nutrition by suckling at the breast directly, no bottles or pumping
Small bites of regular food or water do not disqualify for full breastfeeding
No bleeding past day 56 postpartum until the 6 month mark postpartum.
Some methods suggest going no longer than 6 hours at night without breastfeeding. While this was not mentioned in the study, it is generally used as the standard in fertility awareness based methods to see if someone qualifies to rely on the lactational amenorrhea method (LAM).
LAM is 98% effective for avoiding pregnancy when all criteria is met up until 6 months postpartum. After that, efficacy drops precipitously.
What about ecological breastfeeding?
Ecological breastfeeding requires even stricter criteria and may delay fertility for much longer. Bleeding past day 56 does not disqualify someone for ecological breastfeeding. Ecological breastfeeding should not be confused with LAM! Ecological breastfeeding was coined by Dr. Sheila Kippley. You can buy her book here.
The criteria include:
Breastfeed exclusively for 6 months
Pacify your baby at your breast
No bottles or pacifiers
Sleep with your baby for night feedings
Sleep with your baby for a daily-nap feeding
Nurse frequently day & night. Avoid schedules.
Avoid anything that would separate you from your baby / prevent regular nursing
Symptothermal Method Studies on Breastfeeding
For the first part of this overview, I am going to cover a few symptothermal studies that followed breastfeeders from birth to return of fertility. Symptothermal charters record cervical mucus and basal body temperature daily in order to track their fertility and determine when the fertile window is opened and when it is closed.
In “Breastfeeding and the Symptothermal Method,” Kennedy et al. followed 73 women who charted with a symptothermal method in Australia, Canada, England. While this is a small sample size, the team collected a ton of data: 22,538 diary sheets, 9,428 urinary vials to measure hormones, and 1,600 follow-ups with the women (Kennedy 1995).
Kennedy et al. reported the following data regarding the wait to return of fertility:
Only 25% of first ovulations postpartum had “adequate luteinization.” This means over three quarters of first ovulations were likely infertile (Kennedy, 110).
In retrospect, up to 51% of possibly fertile days identified by sympto-thermal would not have lead to conception (Kennedy, 112). The study standard for this was 5 day sperm life.
They found that 94-99% of the time, the sympto-thermal method correctly identified when a day was really infertile. This means that around 1-6% of the time it didn’t identify a day that may have lead to pregnancy (Kennedy, 112).
They recorded four adequate ovulations with those fully breastfeeding for their first ovulation. This was defined as a 10 day or greater luteal phase with adequate progesterone levels. (Kennedy, 112).
Abstinence was expected per the rules for about 50% of the charted days included in the study (Kennedy, 113).
Bonus Information for Cervical Mucus Fans: Fertile mucus in this study was considered anything cloudy, opague, clear, translucent, stretchy, strands, wet, lubricative, moist, or unusually abundant.
Zinaman and Stevenson in the USA followed 25 women until they had 3 ovulatory cycles postpartum (1991).
They found the following data regarding return to fertility:
20% of ovulations in the first ovulation postpartum during the first 6 months were considered fertile (ie a luteal phase longer than 10 days) (Zinaman and Stevenson, 2037).
Basal body temperature appeared inadequate to capture the first ovulation, occurring up to 4 days after the LH peak, but it improved in later cycles (Zinaman and Stevenson, 2037).
Time to Return of Fertility From Birth
Less than 200 days
200 to 300 days
301 to 400 days
More than 400 days
Time to return of fertility among 25 breastfeeding women in Washington, DC. Created from page 2037 in Zinaman and Steveson (1991).
Parentau-Carreau reports the following data on postpartum charting:
65% of first bleeds were preceded by a thermal shift (35).
The collection of charts confirmed the theory that 4 high temperatures should be used postpartum, as there were instances of 3 raised temperatures that were not true shifts (36).
Among temperature shifts during the first 6 months postpartum, 75% lasted 8 days or more (37).
For babies who sucked their thumb or used a pacifier regularly, their mothers experienced return of fertility an average of 13 days earlier than those who only breastfed for soothing purposes (37).
The basal body temperature curve tended to become more steady or regular in the one to two weeks prior to the first ovulation (38).
What can we conclude from all this data?
Breastfeeding and meeting the criteria for LAM is highly effective for avoiding pregnancy in the first 6 months postpartum.
Most first ovulations postpartum are infertile (defined as a luteal phase less than 10 days long).
It is possible to chart during postpartum to avoid pregnancy.
What methods work best postpartum?
I recommend practicing either the Billings Ovulation Method or Marquette postpartum. I do not recommend sympto-thermal method because temperatures are not useful until fertility returns. I only recommend taking your temperature before the 6 month mark to those who are not breastfeeding. In addition, the sympto-thermal method offers less complex mucus patterns than Billings does.
Subjective fertility signs (sensation and appearance)
Only alternate evenings for sex
Very affordable (Billings will work to set you up with a free instructor if you absolutely cannot afford one)
No re-occurring cost
One-time cost for instruction (ideally, please pay your educator if you can! Some instructors may charge after 1-2 years pass)
Marquette Method involves charting urinary hormones using the Clearblue monitor. This monitor reads estrogen and LH levels. This method is going to be more expensive than a cervical mucus only method, so I only recommend it to those who can afford approximately $30 USD a month or more postpartum. Unfortunately, the stick costs fluctuate up to $50 USD or so for 30 sticks, but I have seen them as low as $30 USD. Marquette is approximately 98% effective with correct use.
Objective fertility signs (monitor does the reading for you)
Any time of day sex when available
Expensive by some standards. Sticks cost twice as much in Europe. May not be available in some countries at all.
One-time cost of the monitor ($50-$130 USD depending on if buying new or used)
One-time cost of instruction (unless you go over the year mark, you may need to pay twice)
I have heard that some instructors may offer scholarships, but you would need to contact individual instructors or organizations to learn their policies.
Kennedy, K; Rivera, R; McNeilly, A. (1989). Consensus statement on the use of breastfeeding as a family planning method. , 39(5), 0–496. doi:10.1016/0010-7824(89)90103-0
Kennedy, K., Gross, B., Parenteau-Carreau, S., Flynn, A., Brown, J., & Visness, C. (1995). “Breastfeeding and the Symptothermal Method.” Studies in Family Planning,26(2), 107-115. doi:10.2307/2137936
Parenteau-Carreau, S. (1984). “The Return of Fertility in Breastfeeding Women.” The International Review of Natural Family Planning. Vol. 8(1). pp. 34-38.
Zinaman, Michael; Stevenson, Wilma (1991). Efficacy of the symptothermal method of natural family planning in lactating women after the return of menses. American Journal of Obstetrics and Gynecology, 165(6), 2037–2039. doi:10.1016/S0002-9378(11)90575-4
Are you looking to simplify your basal body temperature charting routine? Is getting up in the morning just too hard to remember to take your temperature? Read on!
There are currently a few wearable basal body thermometers on the market such as iFertracker, Ava, and Tempdrop. In this blog, I will review the Tempdrop device. If you decide to purchase, use this link and get 10% off the device.
Tempdrop is a wearable basal body temperature thermometer that came onto the market in 2017. Rather than setting an alarm, you can simply put this thermometer on before bed. You wear it around your upper arm (and it may be worn in a bra as well). It needs 3 hours of sleep to determine your basal body temperature. The device uses an algorithm to find your true temperature, regardless of how many times you have gotten up or whether you had restless sleep this night.
This device is very popular with shift workers, breastfeeding folks, and other people who don’t get a regular amount of sleep and wake up at different times, or just to those who don’t want to set an alarm!
Tempdrop holds 24 hours of data, and it must be synced at least every 24 hours or you will lose previous data. After wearing it for 15 days (as of March 2020), the algorithm will kick in. (If possible you should back up temp with oral basal body temperature for the first 60 days if you are avoiding pregnancy. If not, use a different method of protection). By day 60, the device will only change and make improvements to the last 2 temperatures taken.
Once you wear it, you will need to sync it to an app to see your temperature. Tempdrop has its own app, but I highly recommend using Read Your Body (pictured below) instead! This app is customizable for every method and can be synced to Tempdrop.
My Experience with Tempdrop
I used the Tempdrop device for almost 12 months. I found my oral temps to be more predictable and more steady when observing my own trends over time. I get very steady or repeating temperatures with oral charts most of the time.
However, I am not a shift worker, so I will admit that I do not need Tempdrop like some people may do. I already have to wake up at the same time 5 days a week, and I don’t find it inconvenient to take my temperature on the weekend. My oral temperatures caught my shift earlier than Tempdrop did on two separate occasions. I have seen other people say that Tempdrop catches their shift sooner than oral temperatures, so this is really an individual thing.
If you are dedicated to using a sympto-thermal method and can’t get accurate temperatures otherwise, and you have tried trouble shooting your routine (vaginal temperatures, pre-warming the thermometer before taking it, using longest stretch of sleep), then Tempdrop may be your best option. You can use my code for 10% off, and I will get a small kickback. Thank you for using my code!
It can be hard to choose the right method for you. In this graphic, I have simplified the main signs, times of intimacy, and efficacies for the four methods that I am most familiar with.
As part of my charting journey, I have personally compared and charted with Billings, sympto-thermal, and Marquette. You can view my charting comparisons here.
The graphic is intentionally simplified. Method rules will vary, particularly if you are using a different protocol of the method or combination of signs. My Marquette example is for monitor-only rules.
Time of day for intimacy is very important to consider as a part of the decision making process. If you and your partner’s schedules don’t mix well, this may sway you towards another method!
Some couple like intimacy to feel spontaneous. If you never want to worry about time of day, Marquette is likely the best method to choose.
On the other hand, if you want your fertile window to be defined by cervical mucus, you may want to sacrifice any time of day sex for the flexibility of opening the fertile window that may come with using alternative evenings of the basic infertile pattern in Billings.
I recommend interviewing an educator and telling them your unique situation before committing to a method.
To find an instructor, I recommend using the Read Your Body Educator directory linked here. You can use it to find an instructor based on the fertility signs you want to chart, your location, price range, and more!
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 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.
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:
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!
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.
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.
I began this certification having been quite dissatisfied with my previous certification in the sympto-thermal method. I found the sympto-thermal method inadequate for irregular cycles or postpartum cycles, as well as for any cycles with continous mucus.
This certification 100% cleared up all doubts I had about being able to teach people in these situations! I love that Billing’s motto is “Keep it simple.” Ultimately, this certification gave me the confidence to give up temperature taking as a part of my fertility awareness routine.
Before beginning the certification, I took an introductory class with my spouse in the method. This gave me about 6 months to try to apply the principles to my charts before beginning training. I had previously certified in a “Billings-based method” but learned quickly that authentic Billings is a different creature altogether.
I recommend that anyone who is going to train in this method learn to practice it first for at least 6 to 12 cycles under the guidance of an accredited teacher. Joining this program without learning the method first is going to leave you lost on your charts – when you should be confident in your charts before helping others.
The class began in December 2019 and ran through September 2020. We met once a month for approximately an hour (sometimes a little more or less). Inbetween meetings, we were expected to read one to two chapters of material and complete 5 or more worksheets that included chart evaluation and quizzes.
I really appreciated the live classes because my previous certification had no live component. I’m a strong believer that synchronous connection is really important for learning something new.
During class, we were shown PowerPoints and given time to ask questions about the homework. Hearing from long-term accredited teachers about different charting circumstances did wonders for my existing knowledge base. It was incredibly valuable.
Full disclosure: It is important to know that Billings was founded by and is primarily run by Catholics. These meetings often began with prayer or referenced God. Teachers are not required to teach the religious component of the PowerPoint. That means that Billings can be presented in a secular manner. The WOOMB International head organization notably does not include religious elements in their presentation of the method. The science of the method is solid regardless of any ideology attached to it.
The next step after passing an exam on the material was to begin practicum. Practicum is the supervised portion of the certification where you teach 6 to 10 clients minimum in the method while submitting charts and questios to a supervisor selected for you by the organization.
Practicum was the most enriching part of the experience, and I recommend that anyone who does the training utilize this time to your best advantage. I learned how to help people identify complex basic infertile patterns where they never have dry days. This was not possible in my previous method. I was able to support multiple postpartum women as well as folks with PCOS or who were trying to conceive. I learned so much by meeting with my clients and sending charts to my supervisor.
The follow-ups and classes in Billings are mandatory live meetings (video calling, phone call, or in-person). The follow-ups generally last 15 to 30 minutes depending on the client and how early they are in the process. Follow-ups and classes are required to be live, and this is based on what was done to reach efficacy in the Billings studies. We generally meet with clients seven or more times in the first 6 months, and then every 1 to 3 months. Some people may have more or less follow-ups depending on when they reach autonomy and things like cycle characteristics (postpartum people tend to meet up until the third ovulatory cycle after return of fertility.)
After having enough clients in different situations (postpartum, trying to conceive, trying to avoid, regular and irregular cycles), I had a final meeting with my supervisor. Before this, I had to compile a document of every client chart. This was a bit laborious as the Billings charts cannot be exported to PDF without losing part of the chart. I had to screenshot segments of the charts and then re-assemble them. This meeting with my supervisor lasted about two hours, and we discussed all of my client charts and any corrections that needed to be made.
Following that, I was recommended for the final step. I recieved a mailed in exam that involved correcting a full paper chart and writing why I made those changes and what mistakes were originally made.
I turned in this exam to two graders. They then met with me and discussed the chart and any necessary corrections. They approved my certification at the end of the meeting.
Billings Ovulation Method teachers are required to do continuing education to maintain their certification. This is an investment of approximately $300 to $600 every three years. While this is costly, it is really important to attend further training where the teacher can see more advanced charting techniques and learn about health conditions, efficacy, and more!
My Final Thoughts
I would recommend this certification program to anyone who is interested in having an in-depth understanding of cervical mucus charting. The Billings Method teaches about things like the “pockets of shaw” and the cervical mucus crypts. My previous certification did not include close study of the patterns of cervical mucus. This program fundamentally changed my thinking about temperatures always being a necessary part of charting. I ended up dropping temperatures completely after 3 years of using basal body temperature.
Billings allows teachers to order all supplies, including digital materials, for clients. This means I do not have to produce my own materials, and it is super useful for quickly mailing clients what they need.
To make the most of out of this program, I recommend also reading the scientific studies on the side. Unfortunately, the program did not go into a lot of depth on the previous research studies. As someone in academia, I really like understanding all the different correct use and typical use statistics. I’m often questioned about efficacy, and I want to be able to answer people’s questions. If this also describes you, I recommend the following articles:
This article is for the husbands, boyfriends, spouses, or sexual partners of anyone using a form of fertility awareness for pregnancy prevention.
Charting cycles for pregnancy prevention is a big life change, especially for the female charter. While the charter has to learn to interpret their cycles, it is fundamental that they have a supportive partner in the process.
So, What is Fertility Awareness?
Fertility awareness involves tracking one or more bio-markers of the female cycle. These bio-markers include: cervical mucus, basal body temperature, cervical position, urinary hormones, and cycle start dates. The bio-markers are used to draw a fertile window. Fertility awareness has been studied scientifically for nearly a hundred years. There are a plethora of studies on the topic. Click here to read the 2018 Overview of FABMs. In general, you can expect approximately 98 to 99% efficacy across all modern fertility awareness methods.
Your partner will be tracking based on whatever method she chooses. A method is a way of categorizing bio-markers. For example, I teach the Billings Ovulation Method. This method tracks the bio-marker cervical mucus along with sensation felt at the vulva.
One of the first things you will learn when charting is that MALES ARE FERTILE 24/7. Females are fertile only cyclically, and on average the fertile window will be for less than 1/3rd of the female menstrual cycle.
In the beginning, there is sometimes a steep learning curve with tracking these signs. Your partner may forget to check cervical mucus at every restroom break or they may be erratic in taking their temperatures. Your role at this time is be supportive. If you are living with your partner, you can help remind her to take her temperature upon first waking (if they are choosing to chart this sign!) You may also want to take part in keeping the chart.
While it is relatively rare for the partner to help chart, it is encouraged that you learn how to help classify her fertility signs or read the chart if possible. In the very least, you need to learn to respect your partner’s fertile window and not expect to ejaculate inside the vagina in the fertile window. I’m being blunt here. You will get used to “TMI” with charting! You can learn to understand the cycle by taking a class together. This is a great activity for bonding, and so that you have more equal responsibility in your family planning.
An easy way to get involved in your partner’s charting routine is to use a paper chart. I keep a paper chart on the bedside table. It is always visible. My chart is pretty easy for my partner to read because the “baby” symbols mean possible fertility. You could do this with any method. Sit down together when you record the observations. Have your partner to explain what the fertility status of the day means.
But Why Would I Attend a Class or Learn About Charting if I’m NOT the Female Partner?
Because you want to be a good, supportive partner!
When you understand your partner’s chart, you understand the chance of pregnancy that you both have. This can prevent mistakes from occurring if there is more than one set of eyes on the chart. When you become attuned to your partner’s menstrual cycle, you will also begin to realize why their mood might change throughout the cycle. This is fantastic for relationship communication. Your partner is not perfect. They may make mistakes when charting. Two is better than one for catching these!!
How Will We Avoid Pregnancy in the Fertile Window?
One of the first things you will learn when reading a fertility awareness book or taking a class is that you are expected to abstain from penis-in-vagina sex in the fertile window.
The reason for this is simple: it is only possible to get pregnant in the fertile window.
If you have penis-in-vagina sex in the fertile window, there will always be a chance of pregnancy. If you are avoiding pregnancy, this means that sex in the fertile window could result in an unintended pregnancy.
During this time, it is suggested that the couple work on other aspects of the relationship. Go on dates, cuddle, talk, play games.
If you decide to break the rules by having sex, you should be prepared for the possibility of pregnancy.
For Catholics, this is the only “licit” option for the fertile window.
For non-Catholics, oral sex and sex involving hands is safe in the fertile window as long as no semen ever gets near the vulva or the vagina. If semen touches this area, pregnancy can occur.
To determine how you will proceed in the fertile window, you and your partner should place yourself on the intentions scale. In the context of fertility awareness, intentions means how open you are to pregnancy.
The basic possible intentions follow. Select which is most appropriate to you as a couple. TTA means “Trying to Avoid” a Pregnancy.
TTA Seriously Avoiding: For these people, an unintended pregnancy may be devastating, whether to health, the relationship, or finances. A pregnancy is being avoided very strictly. These people should adhere to the rules of their method as closely as possible.
TTA Regular Avoiding: For these people, pregnancy is being avoided and the rules are followed. A pregnancy wouldn’t be convenient, but it would not endanger their life.
TTA Loosely Avoiding: For these people, a broken rule isn’t the end of the world. They may do strategic risk-taking like breaking rules on the cusp of the fertile window, or using something like the withdrawal method in the fertile window. They are not actively seeking a pregnancy, but they are okay with some chance of it happening.
TTW Whatever Happens: For these people, pregnancy would be okay whenever it happens. They break whatever rules they want. They aren’t actively timing sex for the most fertile days, but it might happen.
TTCTrying to Conceive: For these people, the rules do not have to be followed. They actively try to have sex in the fertile window.
You and your partner should discuss this scale and decide where you land before utilizing the fertility awareness method for sex.
What If We Decide to Use Barriers in the Fertile Window?
Remember, while you are fertile 24/7, your female partner is not. It is really important that if you are avoiding pregnancy that you respect your partner’s fertile window.
Some couples decide to use condoms, the withdrawal method, or diaphragms in the fertile window.
The most likely time for a barrier to fail is in your fertile window. After all, you aren’t using them at the other times of the cycle.
I personally believe that a couple has the right to make an informed choice in the fertile window. In particular, the male partner should realize that he is the one putting on the condom or pulling out. If he fails to do either correctly, a pregnancy can result. If you use these methods, do the research and inform yourself about how to use them correctly and what their efficacy is. If you are okay with this risk, you can use barrier methods. At the point you use a barrier method – you are outside of correct use for the fertility awareness method. Always remember that. An unintended pregnancy would be classified as a user error or barrier method failure.
How Long Does it Take to Practice Fertility Awareness Confidently?
On average, you will want to do at least 3 to 6 cycles of follow-up with an instructor to be completely autonomous and confident in charting. When you work with an instructor, you may be able to start utilizing the method to avoid pregnancy as sooln as the first cycle charting! (This is assuming that your partner has been diligent in their charting).
If you have PCOS, are coming off hormonal birth control, or are breastfeeding, you may need close instruction for longer. The Billings Ovulation Method recommends following up until the third ovulatory cycle postpartum. This could take a year or more if fully breastfeeding.
To Male Partners:What Advice Would You Give Male Partners Who Are New To Fertility Awareness?
These responses are taken from a 2019 survey I did on the male partners of FAM users. Enjoy!
“At first it seems backwards since science has a simple fix for conception: hormonal birth control. Some women are fine on hormonal birth control. Some can be really crazy on it. With some women, it can even kill their sex drive. With mine, she becomes so crazy that it kills both of our sex drives. So we’re doing this weird fertility awareness thing. Here’s my advice if you have a woman like mine. Even though she’s so beautiful and sexy that you just want to risk ejaculating in her to possibly get her off, you can’t do it with this. Yes, it puts more pressure on you to wear a condom and/or pull out, but at least your wife isn’t batshit crazy. And she’s still horny. So it’s worth it. Plus you learn a lot about the female body because I guarantee she’ll keep you up at night telling you about it lol. So don’t complain. We’re still getting laid. Unlike our friends who’s wives are on the pill or IUD. It just puts more pressure on us to prevent a baby. If she gets pregnant again, it’s probably our fault with this. And I’m ok with that. War Eagle!”
“You will wish you had always known this information. Test your pre-cum under a microscope for sperm if you are going to use withdrawal.”
“Knowledge is power and pleasure.”
“To do the research to fully understand the anatomy and physiology which will give you confidence in trusting the fertility awareness method.”
“Good luck m’a friend.”
“Don’t be afraid to ask questions!”
“Be patient and understanding whilst always at least attempting to understand the technicalities surrounding the practice of the method.”
“Read as much information as you can and stay informed.”
“Trust your partner, but do some cursory research as well. You both need to understand it to trust it.”
“Learn the actual science (as in the research literature) behind these technologies. Much of the medical establishment unfortunately has both insufficient and badly-outdated knowledge about FAM. Also, such will only be successful if the couple are both wholly on-board and possess the necessary knowledge, discipline, and self-control to utilize the method(s) correctly, whether trying to conceive or to avoid.”
“Get ya woman on it like yesterday.”
“Talk to your significant other and learn from her.”
“Learn about which days are the best to get pregnant; if you want to get pregnant together there is a way to learn the best days with a good degree of certainty. I think other men could benefit from learning this information about their partner.”
“Learn how the world works, and use that knowledge.”
“Listen to your woman and trust what she says about her observations. It’s not like the guy is the one using the method, but it’s good to be aware of it.”
“If you think it’s burdensome, remember the health and relationship benefits far outweigh the daily minor inconveniences. Encourage your SO to do the research to make sure they’re doing it right as well.”
“Shut up, pay attention.”
“If you are concerned about the well being of your partner, you’re more likely to succeed in supporting her and have an involved role in fulfilling both your reproductive goals through fertility awareness.”
“Take a lesson yourself or attend one with your partner, you are only going to trust it if you understand how it works yourself. When you actually see that it makes sense, it’s not some weird alternative thing, you can trust it a lot more.”
This resource is a simple overview of the rules with examples. It links to other resources on understanding the female and male reproductive system. This is a good, fairly quick read for men who want to understand the basic rules.
Jessie discusses her symptoms that lead her to stop taking hormonal birth control. She then does a brief overview of how the fertility signs change throughout the cycle and how sperm life plays into fertility.
This also leans religious but may be useful for men who are having trouble adjusting to avoiding unprotected sex in the fertile window.
“Use of Natural Family Planning (NFP) and Its Effect on Couple Relationships and Sexual Satisfaction: A Multi-Country Survey of NFP Users from US and Europe.” Front Public Health. 2017; 5: 42. Published online 2017 Mar 13. doi: 10.3389/fpubh.2017.00042
This is a recent scientific article that studied the effect of NFP on relationships.
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. I’ve been charting resting heart rate since 2018, and 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. Heart Rate also rises in response to high estrogen levels in the fertile window.
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.
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.
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 Rep7, 1294 (2017). https://doi.org/10.1038/s41598-017-01433-9
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.
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.
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).
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.
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