Ava Bracelet Reviews: My Experience & Does It Work

With so many Ava bracelet reviews out there, it can be difficult to decipher what is real vs. fiction, especially with a company promising that their bracelet can detect fertile days in real time.  That is why I set out to detail my first-hand experience with the Ava bracelet, as a way to help you determine if this fertility tracker is right for you.

Ava Bracelet - Quick Overview

Ava is a clinically proven fertility tracking bracelet, which is worn at night during sleep. According to Ava, it can be used whether you’re trying to conceive, are pregnant already, or simply want to understand your cycle.


• Less invasive than traditional thermometers
• More convenient tracking which is linked to an app
• More reliable for light sleepers

• Easy to use and sync with app, even for those women who might not be tech savvy 

• Measure much more than a typical basal body thermometer, give you more insight to your body, cycle and overall health

• Good customer service


• May be too expensive for some women 
• It requires some time to fully charge, and you have to remember to charge the bracelet during the day, as it must be worn at night

What Is The Ava Fertility Bracelet?

Ava claims that their bracelet is the modern way for women to monitor fertility, conceive naturally, and track pregnancy.  The Ava bracelet is suitable for women trying to conceive, who are currently pregnant, or who just want to know more about their cycles.  It is not currently tested for women with PCOS.

You simply wear the Ava fertility bracelet while you sleep, and their clinically proven sensor technology tracks what is going on with your cycle to let you know which days are the most fertile.  The manufacturer recommends that you wear it for at least four hours during the night. You also need to be asleep for at least three of these hours.

When you wake up in the morning, you sync the data collected on the bracelet to the Ava mobile app on your smartphone or tablet. The Ava app then inputs the data into your database and uses an algorithm to help predict ovulation. However, it offers more insight than just predicting when you are most fertile.

This innovative tracker collects data on nine physiologic parameters while you’re sleeping, so you can use it to gain insights about your periods, sleep, stress, pulse and to continue to track other parameters during pregnancy.  In this way, it’s different from other trackers because it takes multiple data points into consideration.

Women can also use this app to understand how their cycles impact their health.  The Ava bracelet also looks at your breathing rate, resting pulse rate and heart rate, your bioimpedance, and more. This will give you a more exact understanding of when your fertile window begins, as well as when it ends.

Depending on the specific Ava package that you choose, you can also get access to a supportive community of other women using Ava to help them conceive. There are also options that allow you to participate in fertility webinars and even chat with a fertility coach.

Ava has been scientifically tested and studied over the course of one year of wear. It’s also been registered with the FDA and is CE certified

The video below provides a quick overview of the Ava bracelet, including how you can use it to track your fertility and get the most accurate fertility predictions possible:

How Does The Fertility Tracker Work?

The Ava bracelet is one of the many tools that you can use to track your cycles. 

It is relatively cheap to track your BBT, as you only need a basal body thermometer and the willpower to wake up each morning at the same time to record your temperature. Modern wearable devices, like Ava, take away the disadvantages of traditional BBT temping, making them very appealing and reliable fertility tracking methods.

Most fertility trackers rely on basal body temperature (BBT) or urinary LH levels to predict the beginning of the fertile window. Ava doesn’t require you to take your temperature first thing in the morning or pee on a stick.

With Ava, the information is collected while you sleep and then synced to the mobile app in the morning. The creators of Ava also claim that this is the only device that uses a variety of physiological parameters to detect the fertile window.

They believe that the BBT or LH levels alone don’t offer an accurate way to track ovulation and predict the fertile window.

Ava attempts to predict ovulation based on a variety of data that it collects while you sleep. Some of the information collected includes:

  • Skin temperature
  • Resting pulse rate
  • Breathing rate
  • Heart rate variability ratio
  • Movement while sleeping
  • Bioimpedance
  • Heat loss
  • Quality of sleep

The creators of Ava claim that your resting pulse rate is an effective measurement for predicting ovulation. During clinical studies, they noticed a significant increase in the pulse rate of women during their fertile windows compared to other phases of their menstrual cycles.

Along with the resting pulse rate, Ava uses other data to offer a complete look at your health and the changes that occur during your menstrual cycle. For example, your skin temperature may increase slightly just after ovulation.

These measurements are combined with other data, such as quality of sleep, to help determine the accuracy of the information collected.

My Experience With The Ava Fertility Bracelet

I will describe all the parameters that this fertility tracker monitors and share my thoughts about them.

Setting Up My Ava Account (Screenshots)

I found it very straightforward to set up my account, although I faced some difficulties syncing the bracelet and the app.

Ava Bracelet Personal Details
Ava Menstrual Cycle Information
Ava Pairing with the Device via Bluetooth


This was one of the features that I liked about Ava. For someone who had tried several basal thermometers, including a non-mercury glass basal thermometer,  I found it very convenient to sleep with my tracker without having to wake up to measure my BBT.

Note: When I initially started using the Ava bracelet, I also temped using a digital basal thermometer (specifically Mabis Basal Thermometer ) to compare my findings.

My temperature readings with Ava were slightly lower than those measured with the Mabis Basal Thermometer. I didn’t find this surprising because I used the Mabis thermometer to take my oral temperature and the bracelet to measure my skin temperature.

Nevertheless, I achieved similar BBT graphs with both tools. The difference in temperature readings didn’t matter. In fact, what mattered was that I observed basal temperature shifts from a lower, pre-ovulatory level to a higher, post-ovulatory level.

I initially tried to use My Monthly Cycles to chart my BBT manually, but after dabbling around and not being able to find where I could enter my data, I gave up and downloaded this chart from Baby Center.

A Comparison of My Manually Entered Data Versus Ava Data

Comparing manually entered data on BBT chart with Ava data
Comparing manually entered data on BBT chart with my Ava data

Resting Pulse Rate

My digital basal thermometer could definitely not provide these data. Initially, I didn’t think I was going to benefit from these data.

You might be asking yourself, “Why is the resting pulse rate important in tracking fertility?”

Let’s look at previous research findings. It was shown that during the ovulatory and luteal phase, women’s resting-heart rates were significantly higher than in the menstrual and follicular phases.

The luteal phase occurs after ovulation and before your next period starts while the follicular phase occurs after menstruation and shortly before ovulation; the ovary gets ready to release an egg during this phase.

In fact, a woman’s resting heart rate rises by about two beats per minute during her fertile window compared with the rate during menstruation.

In simpler terms, a bump in resting heart rate can indicate that ovulation will occur in about 48 hours, and if you’re trying to get pregnant, you can plan to have intercourse with your partner during this period.

Breathing Rate

Like the heart rate, breathing rate also varies during a woman’s menstrual cycle. In fact, studies conducted on asthmatic women suggested a link between respiratory symptoms and hormonal changes during the menstrual cycle.

Your breathing rate also varies with your daily activities. For example, you breathe more often when you’re involved in vigorous activity, but you breathe less often when you’re resting or sleeping.

By collecting data on respiration rate, the Ava Bracelet can also help indicate your fertile window.

Heart Rate Variability Ratio

Heart rate variability (HRV) is a variation in the interval between your heart beats. This can be used to indicate your level of stress.  

The bracelet measures the HRV ratio, which indicates how stressed you are; i.e., the lower the rate, the less stressed you are. I wasn’t sure about the cut-off value for the HRV ratio and was okay with the app indicating whether it was low or high.

How can these data be helpful?

If your HRV ratio is high and you’re trying to get pregnant, you might want to seek help and learn about ways of decreasing stress while you’re trying to conceive. Remember that stress can interfere with conception. 

In fact, a reproductive specialist observed that when stress management techniques were applied, some women were able to conceive, suggesting a link between stress and infertility.

Sleep Quality

According to the National Sleep Foundation, an adult should get at least seven to nine hours of sleep per day.

But in reality, how many moms get that much sleep per day? As a working mom, I hardly get six and a half to seven hours of sleep per day due to the nature of my job.

What does sleep have to do with your fertility?

Evidence points toward an association between sleep and the menstrual cycle, i.e., your menstrual cycle sleep can affect your cycles and vice versa. 

Other Parameters 

Other parameters such as perfusion, bioimpedance, movement, and heat loss are all useful in tracking fertility.

I have never really taken the time to study these data, and I hope to post an update here as I familiarize myself with this tracking bracelet and study the various parameters.

Issues That I Faced With The Ava Bracelet

I felt uncomfortable during the first few days in which I started using it. I was so conscious that I had something around my wrist whenever I was in bed.

Although the material was soft, it was hard not to think that I was sleeping with a watch. After a few nights I did get used to it, and I was able to easily fall asleep while wearing it.

On the first day that I got the bracelet, I noticed that it charged very quickly. It surprised me to see a Green light appear only a few minutes after I plugged the charger in.  While it appeared fully charged, it actually took several hours the first time I plugged it in.  So for the first charge, I would recommend leaving it to charge for the suggested time, even if the green light does appear.


Ava bracelet won't sync with the app

I also initially encountered problems when syncing my Ava. I had used Smart Basal Thermometer before trying Ava, so I was confident that syncing was going to be straightforward.

Connecting the module to my computer to sync the data every morning was a little challenging.

Once you connect your Ava, a blue LED light should turn on. But if a blue does not turn on, you should unplug your bracelet and plug it in again.

Occasionally, I forgot to turn on Bluetooth and encountered problems getting the data to sync. You should also check this if you’re facing trouble when syncing your Ava.

You might also want to contact support if you’re having trouble with your device.

Overall my experience was positive, and any little issues that popped up were easily resolved.

Ava Bracelet Reviews From Other Real Customers

Many women have shared their experiences, and although some women have reported that Ava wasn’t for them, many are satisfied with the bracelet and have found that it could help them predict when they will be most fertile.

I’ve put together some reviews that women have shared in the screenshots below.

Ava fertility bracelet feedback

Source: Mumsnet.com

Ava tracker feedback

Source: Forums.thebump.com

Ava feedback from a user

Source: Community.whattoexpect.com

Clinical Results

Now that you know more about real women’s experiences with Ava, let’s take a closer look at what science has to say.

Studies have shown that Ava helped women to know about five fertile days within their cycles. The main component and data point that helped to determine fertility?

The pulse rate of the women wearing the devices.

When women first entered their fertile window, the bracelet helped to detect a sudden increase in the overall pulse rate of the wearer. The same study referenced above also found that the Ava bracelet is about 89% accurate when it comes to outlining a woman’s most fertile days.

Those are the kinds of numbers that you want on your side.

Of course, to get these results, you need to make sure Ava is right for you.

FAQs About The Ava Bracelet

1. How Reliable Is The Ava Bracelet

In a year-long clinical study, Ava saw on average 5.3 fertile days per cycle with 89% accuracy.  At 89% accuracy of correctly identifying infertile or fertile days, Ava is a fairly reliable fertility tool to use.

2. Does The Ava Bracelet Tell You When You Ovulate?

Ava provides a cycle report, which includes information about your last 12 completed cycles with Ava.  The report will include details around cycle length, you period duration and flow, and your predicted ovulation.

3. How Much Is the Ava Bracelet?

The Ava Fertility Bracelet typically costs between $300 – $400.  Click here to check the latest price directly from Ava.

4. Is Ava Bracelet Good For PCOS?

Ava has not been tested for PCOS.

5. Can You Really Get Pregnant Using Ava?

You’ve probably read stories from influencers who used the bracelet and conceived within six months (here, here, and here). However, it is important to remember that it’s not because the bracelet worked for a friend, relative, or reality TV personality that it’s going to work for you. Besides, there are so many factors involved that it is hard to determine which factors actually make it possible for a couple to get pregnant.

Nevertheless, Ava Science Inc. affirms that you can double your chances of getting pregnant in one month if you time intercourse accurately. Ava is just one method to help you pinpoint your fertile days.

Like most women, you would like to read stories from people who have successfully gotten pregnant after using the bracelet. After everything, who would want to fork out more than $200 for a device that won’t serve its purpose.

Here are some real reports from people who used Ava and got pregnant:

One user said,

Pregnant after 2 cycles on Ava. The other free apps had my ovulation 5 days sooner than Ava. Ava even told us to try one more day since my parameters weren’t in the right range. So glad we tried again and this time it was our time <3″ />

Another woman said,

I don’t have any issues with my bracelet. Just the app signs me out sometimes and it’s a pain. Happy to say I am pregnant after 22 months of trying and 3 months of Ava. I do believe Ava helped. It’s still early but we are hopeful. Thank you!

And this report is from a woman who got pregnant five months after she started using Ava

The Ava Bracelet works wonderfully. My husband and I were trying to get pregnant for a year and a half and then we ordered the bracelet. I have very irregular periods and it helped us narrow our window which resulted in us becoming pregnant in 5 months! We are so happy!

View more on Trustpilot.com.

6. Are There Women Who Won’t Benefit From Using Ava?

While the majority of women who are trying to get pregnant are able to use the Ava fertility tracker, there are a few exceptions.

Although Ava is working on technology and data collections that are compatible with irregular cycles, currently, you need to have a cycle that falls within 24-35 days to use it.

If you currently have PCOS or are using fertility treatments to help you get pregnant, Ava may not be the right choice for you.

Polycystic ovary syndrome (PCOS) is a hormonal condition that can cause periods to stop or make them more difficult to predict and track. Along with PCOS, other hormonal imbalances that impact your menstrual cycle can make Ava less effective at tracking ovulation.

Ava relies on a baseline for predicting your fertile window. When you have irregularities in your cycle, it has difficulty offering an accurate prediction.

It’s also important to remember that Ava is not meant to be used as a method of contraception. If this is your goal, speak to your doctor about getting on birth control, or use protection during intercourse.

Alternative Methods of Tracking Ovulation

Instead of using Ava, there are other methods for tracking ovulation, including charting your BBT in conjunction with your cervical mucus.

Checking your cervical mucus doesn’t require any devices, apps, or equipment. You simply need to use your fingers to check the mucus throughout your cycle.

For several days after your period, the mucus should be dry. As ovulation approaches, your body produces more mucus and it may become stickier and yellow or white.

Just before ovulation, the mucus should be clear and slippery, similar to egg whites. This is when you’re most fertile. After ovulation, the mucus starts to dry out again, leading up to your period and the start of a new cycle.

Charting your BBT with a basal thermometer also helps determine ovulation. Throughout your menstrual cycle, your resting body temperature changes slightly and may include a small spike right before ovulation. To chart your BBT, you need a digital thermometer that is accurate to 1/100th of a degree Fahrenheit.

You may also use Ovacue to track ovulation and predict the best time for fertility. Ovacue is a simple device that tracks your cycle and helps predict ovulation up to seven days in advance.

It includes a saliva sensor and cervical mucus sensor for tracking electrolyte levels in your saliva and mucus. After several cycles, Ovacue charts a trend and begins to accurately predict the fertile window.

If you are struggling with fertility, and considering more comprehensive testing, you can also begin tracking your fertility hormone levels through blood testing.  These can be ordered through your doctor, or you can now take these tests from the comfort of your home through companies like Modern Fertility

Wrist Wearable Device for Natural Fertility Planning

Final Words: Is The Ava Bracelet Worth It?

As you’ve learned from this post, countless women have seen success with the Ava fertility bracelet. I’ve read most of the published literature available on wearable fertility trackers, and the available data are encouraging.

I also personally found Ava easier than checking my basal body temperature every morning.  I suffer from insomnia and have irregular sleep patterns, so with temping I was never sure how accurate my results were from temping.  Ava took away a lot of this uncertainty, and gave me helpful insights about my health and cycle.  Overall, I do recommend this product for women trying to conceive or just wanting to learn more about their natural cycle. 

Ava is a simple device to use. You just need to wear it at night while you sleep. After syncing the information collected during the night with the Ava mobile app, you can review valuable information about your menstrual cycle.

Ava works best when you have a regular menstrual cycle.  It is very important to note that Ava has not been tested for PCOS.  However, those with irregular cycles, PCOS, or other hormonal issues may not get effective results with the Ava fertility bracelet.  Please consult with your doctor or directly with Ava if this is a concern for you.

If you’re currently struggling to get pregnant, it can often feel as though you’re on your own. However, it’s important to remember that over 6 million women have had trouble conceiving at some point in their lives.

The good news? Especially in today’s world, there are more tools than ever before that you can do to help you better understand and improve your ability to conceive. From fertility trackers and home sperm test kits to supplements and ovulation kits, there’s no limit to the ways in which you can improve your odds.  Ava is just one great way to help you along in your fertility journey. 

Have you tried the Ava fertility tracker?  Comment below to let me know your experience and review!

If you’ve had success with your fertility tracking and are now expecting, it’s also a good time to start prepping for when you’re little bundle of joy arrives.  Check our reviews for the best postpartum pads, postpartum underwear and lightweight strollers to help you prepare!  And if you’re thinking about breastfeeding, don’t forget to stock up on nursing tanks — I can say from experience that these will be a real lifesaver in those first few months with your newborn.

Further Reading

  1. Moran VH, Leathard HL, Coley J. Cardiovascular functioning during the menstrual cycle. Clin Physiol. 2000 Nov;20(6):496-504. Read the article.
  2. Leicht AS, Hirning DA, Allen GD. Heart rate variability and endogenous sex hormones during the menstrual cycle in young women. Exp Physiol. 2003 May;88(3):441-6. Read the article.
  3. Barron ML, Fehring RJ. Basal body temperature assessment: is it useful to couples seeking pregnancy? Am J Matern 569 Child Nurs. 2005;30(5):290–6. Read the article.
  4. Sarabia JA, Rol MA, Mendiola P, Madrid JA. Circadian rhythm of wrist temperature in normal-living subjects. Physiol Behav [Internet]. 2008 Nov;95(4):570–80. Read the article.
  5. Baker FC, Colrain IM, Trinder J. Reduced parasympathetic activity during sleep in the symptomatic phase of severe premenstrual syndrome. J Psychosom Res. 2008 Jul;65(1):13-22. doi: 10.1016/j.jpsychores.2008.04.008. Read the article.
  6. Pallone SR, Bergus GR. Fertility awareness-based methods: Another option for family planning. J Am Board Fam Med. 567 2009;22(2):147–57. Read the article.
  7. Usha Rani YS, Manjunath P, Desai RD. Comparative Study of Cardiac Autonomic Functions in Different Phases of Menstrual Cycle in Healthy Young Women Aged 18–22 Years by determining Heart Rate Variability. J. Physiol. Pharmacol. 2013;3(1). Read the article.
  8. de Zambotti M, Nicholas CL, Colrain IM, Trinder JA, Baker FC. Autonomic regulation across phases of the menstrual cycle and sleep stages in women with premenstrual syndrome and healthy controls. Psychoneuroendocrinology. 2013 Nov;38(11):2618-27. doi: 10.1016/j.psyneuen.2013.06.005. Read the article.
  9. Tenan MS, Brothers RM, Tweedell AJ, Hackney AC, Griffin L. Changes in resting heart rate variability across the menstrual cycle. Psychophysiology 2014;51:996–1004, doi:10.1111/psyp.2014.51.issue-10. Read the article.
  10. Shilaih M, Clerck V, Falco L, Kübler F, Leeners B. Pulse Rate Measurement During Sleep Using Wearable Sensors, and its Correlation with the Menstrual Cycle Phases, A Prospective Observational Study. Sci Rep. 2017 May 2;7(1):1294. doi: 10.1038/s41598-017-01433-9. Read the article.
  11. Shilaih M, Goodale BM, Falco L, Kübler F, De Clerck V, Leeners B. Modern fertility awareness methods: Wrist wearables capture the changes of temperature associated with the menstrual cycle. Biosci Rep. 2017 Nov 24. pii: BSR20171279. doi: 10.1042/BSR20171279. Read the article.

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I’m Princila, founder of Check Ovulation and a proud mom of two. I’m an alumna of James Lind Institute. After working in clinical jobs, my passion for writing took its toll, and I ended up switching careers to work in the medical publishing industry. I also have a passion for healthy food, which prompted me to take several online courses in nutrition and health offered by Wageningen University. (I still haven’t completed the courses thanks to my busy mommy schedule!). When I’m not writing/editing scientific and medical manuscripts or taking care of my family, I use my free time to research, learn, and write about healthy living. I have also authored a few books in the self-help niche using the pen names Princila Murrell or PN Murray.

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