Fertility Monitors to Space or Avoid Pregnancy

How to Use Fertility Monitors to Achieve or Avoid Pregnancy Without Hormones

As many of you know, I’ve had six children in nine years. I’m certainly open to having more children in the future, but I feel like my body would benefit from a break from pregnancy/nursing, especially as I am working to overcome my autoimmune disease and heal my thyroid.

Why Not Hormones?

I’ve written before about why I choose not to use hormonal or artificial contraceptives and what I use instead. As I explained in that post:

“Hormonal contraceptives are made from artificial hormone-like substances that attempt to mimic the effects of naturally occurring hormones in the body. Hormonal contraceptives work by:

  • “Suppressing the release of hormones that trigger ovulation;
  • Stimulating production of thick cervical mucus, which prevents sperm survival and ability to travel to a ripe egg in the fallopian tube in the event that ovulation does occur;
  • Disrupting the ability of the cilia (whip-like cells that line the fallopian tube) to move a fertilized egg toward the uterus in the event that conception does occur;
  • Preventing buildup of the uterine lining, and thereby inhibiting implantation of a fertilized egg in the event that one arrives in the uterus.” (source)

Personally, the mere possibility that conception could occur and then the fertilized egg could be prevented form implanting is enough to keep me from ever wanting to use hormonal contraceptives (along with a host of other reasons), but it turns out that artificial hormones aren’t good for mom either (or the water supply for that matter):

“In The Breast Cancer Prevention Program, Sam Epstein, MD, writes, “more than 20 well-controlled studies have demonstrated the clear risk of premenopausal breast cancer with the use of oral contraceptives. These estimates indicate that a young woman who uses oral contraceptives has up to ten times the risk for developing breast cancer as does a non-user, particularly if she uses the Pill during her teens or early twenties; if she uses the Pill for two years or more; if she uses the Pill before her first full-term pregnancy; if she has a family history of breast cancer.” Thus, a woman who takes the Pill for two years before she’s 25 and before she’s had a pregnancy to term increases her risk of breast cancer tenfold.” (read the full post here)

As I’m not personally a fan of increased cancer risk, and I’m also not a fan of altering my hormones with artificial means, I’ve used alternative methods to track my fertility. A woman is only cyclicly fertile and within a normal cycle will go from infertile to fertile (for a short window) and back to infertile. Couples who have tried to conceive a child know all too well that there are infertile periods of the month.

Natural methods of achieving or delaying pregnancy depend on knowledge of a woman’s cycle and body to be able to pinpoint the fertile window and use that time accordingly. I often hear it said in the health sphere that every individual’s body is different and that the path to health depends on being able to listen to one’s body and I think this holds especially true when it comes to fertility.

“Natural methods use cues like Basal Body Temperature (BBT), mucus production, cervical position and other symptoms to effectively predict ovulation and avoid intercourse during this time. There are classes teaching how to practice these methods in most areas, or for those who can’t find a class, there are websites like Fertility Friend (free website) that  allow users to chart symptoms and pinpoint ovulation. These websites now even have apps and mobile features for easy tracking.”

There are now computerized devices that make this process of tracking fertility more accurate and easier to do. Most fertility monitors are recommended for achieving pregnancy but aren’t labeled for use in avoiding pregnancy or recommended while breastfeeding. I tried to find information on using fertility monitors for these purposes, but there was limited information available.

Using Natural Fertility Monitors

When given the chance by Fairhaven Health, I decided to test four of these fertility monitors side by side for six months and compare the results to see:

  1. Which were the most accurate
  2. If they could be used during breastfeeding or to delay pregnancy

The four methods I compared side by side were:

  1. The OvaCue (I now use the OvaCue Mobile with my iPhone)
  2. Fertile Focus Ovulation Microscope
  3. iBasal Thermometer
  4. Ovulation Sticks

I also charted my fertility using the Symto Thermal method of Natural Family Planning. This is what I found:


What it is: The OvaCue was easy to learn how to use and provided two different types of data: oral and vaginal readings. The OvaCue works by measuring electrolyte levels in saliva and cervical mucus and pinpointing ovulation up to 7 days in advance. According to this website: “The OvaCue Fertility Monitor consists of a hand-held monitor with a colored screen, an oral sensor, and a vaginal sensor – the ideal combination for pinpointing your most fertile days in your cycle and for confirming when ovulation occurred. The monitor has been demonstrated to be over 98% accurate in predicting ovulation in studies funded by the National Institute of Health.”

How I Used It: The OvaCue doesn’t require any charting or additional data. All I had to do was take an oral reading each morning and a vaginal reading each afternoon/evening. It charted my cycle based on the readings and gave a very clear indication of when ovulation would occur and when the infertile window began. Like all fertility monitors the OvaCue is most accurate for women who have a somewhat regular cycle but it works for those with irregular cycles as well. While breastfeeding and before I had a cycle, I simply reset the monitor every month if I didn’t see ovulation to create another window for it to measure. This would be similar to what might happen for a woman with anovulatory cycles or other hormone imbalances.

The OvaCue is 98% accurate in testing:

OcaCue comparison

I used the OvaCue to track my hormone levels while breastfeeding and for several months had only minor fluctuations in electrolyte levels, indicating no fertility. Once fertility returned, it predicted ovulation 7 days in advance and gave me an accurate measure of when the fertile window ended.

Overall, I preferred the OvaCue and it is the method that I will be using from now on. It is more pricey than the other fertility monitors I tested (though less than the popular LadyComp), but I felt it gave the most accurate data. The OvaCue also matched my charting exactly for my fertile window and showed fertility ending when basal temperature confirmed that this was the case. The new OvaCue mobile is less expensive and used with an iPhone.

Fertile Focus

What It Is: The Fertile Focus uses a microscope to track the changes in the saliva that correspond with changes in fertility. The website explains the FertileFocus microscope:

“Designed by leading fertility expert, Dr. Amos Grunebaum, ObGyn, Fertile-Focus is the affordable high-quality saliva-based fertility test (or personal ovulation microscope) that predicts ovulation with 98% accuracy – up to 72 hours in advance.

Fertile-Focus allows women to identify their most fertile days by testing and viewing the visual changes that take place in saliva throughout the monthly cycle. Just prior to ovulation, women experience an “estrogen surge,” and a distinct fern-like pattern becomes visible in saliva due to the hormonal changes. Fertile-Focus provides the highest quality, powerful 50x magnification lens for easily identifying these crystal “ferning” patterns.”

How I Used It: The Fertile Focus predicts ovulation several days in advance based on the patterns in the saliva. Since I was using the OvaCue while nursing a baby and creating “cycles” for it to track, I used the Fertile Focus as a backup method to show ovulation if the OvaCue missed it. All that is required is to place a small amount of saliva on the fertile focus each morning (before eating or drinking), let it dry and then look at it with the microscope.

Fertile FocusThe Fertile Focus showed the ferning pattern in my saliva at the same time that my charting showed a rise in fertility and the same time that the OvaCue predicted ovulation. It only gave me about 3 days advance notice, compared to the 7 day notice with OvaCue but it was fascinating to see the change in my saliva.

I liked how portable and easy to use the Fertile Focus was, but prefer the extra data with the OvaCue. The Fertile Focus is also the least expensive of the methods I tried and though it didn’t provide as much advance notice of ovulation, it did predict it accurately.

iBasal Thermometer

What It Is: The iBasal Thermometer is a device that relies on the Basal Body Temperature (BBT) method for tracking fertility and pinpointing ovulation. The iBasal has a built in alarm clock to remind you to take temperature each morning and it measures temperature to 1/100th of a degree. I’ve charted with the BBT method before but the iBasal charts for you to make the process easier. The website explains: “Basal body temperature (BBT) charting is a tried and true method for determining precisely when during your menstrual cycle you ovulate. Your basal body temperature is the temperature at which your body rests, which tends to be a bit lower than your “normal” temperature, usually 97 point something degrees F versus 98.6 degrees F. By measuring your BBT each morning (after a full night’s sleep) throughout your cycle you can detect the natural and subtle rise in your basal body temperature that occurs just after ovulation. This post-ovulatory shift in BBT is caused by increased production of the hormone progesterone, sometimes referred to as the “warming hormone”.”

How I Used It: I kept the iBasal by my bed and took my temperature with it each morning. While I was nursing and didn’t have a cycle, it showed slight variations in my temperature, but not enough to indicate a shift in fertility. Also, since I was working on improving my thyroid hormone levels during this time,  it registered a few false ovulations, though most women (even while nursing) wouldn’t have this variable to deal with. It did confirm that ovulation had happened after (which corresponded with the other methods I was using) but it didn’t give advance notice.

Ovulation Sticks

 What It Is: Ovulation sticks use urine to identify a rise in LH (Leutenizing Hormone) that occurs 12-48 hours before ovulation. They are very accurate, but don’t give much advance notice of ovulation.

How I Used It: I use these mainly to confirm what the fertility monitors were saying and confirm that ovulation did occur. They can be pricey and must be bought each month, so they aren’t the best option but they do give an extra way to confirm that ovulation has occurred and that LH levels have dropped. I won’t use these long term but they were useful as an extra way to verify the data from the other machines.

What I Use Now

After comparing all four methods side by side for six months, I’ll be sticking with the OvaCue Mobile and using the Fertile Focus as a back-up to verify. There is also a great community at Fairhaven Health of women using these different methods and they have forums where you can ask questions and get advice.

As I’m trying to temporarily avoid pregnancy, I’m using these methods to pinpoint my fertile window so I can avoid getting pregnant, but the same technology is excellent at helping pinpoint ovulation to achieve pregnancy.

With this existing technology and as more research and innovation happens, fertility monitors provide an alternative to hormonal contraceptives and also allow women to know and understand their bodies and possibly identify hormonal problems.


Study of Accuracy of Fertility Monitors

Full list of my resources at the bottom of this post

Full list of resources supporting the electrolyte method used by OvaCue at this link

Have you ever used a fertility monitor or natural family planning method? Please share what worked for you below!

You May Also Enjoy These Posts...

Reader Interactions

It Shouldn’t Be This Hard to Be Healthy…

Become a Wellness Mama VIP member for free and get access to my handbooks & quick start guides to help you detox your home, become a master of home remedies, make beauty products from scratch, and conquer mealtime madness!

Yes! Let me in!

Wellness Mama widget banner

Reader Comments

Join the Conversation...

Please read the comment policy before replying to this post.