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How to Get the Most Accurate Results With Ava

Ava bracelet accuracy

What should you do if you’re concerned that Ava isn’t detecting your fertile window and ovulation accurately? This guide explains some of the most common reasons why this might happen:

Step 1: Confirm the accuracy of your other cycle tracking method.

The only way to confirm ovulation with 100% certainty is ultrasound. All other methods have some level of uncertainty and room for interpretation. If you are comparing Ava’s accuracy to another fertility tracking method, there are a few important caveats to keep in mind:

  • LH Tests: Most women will ovulate 12 – 36 hours after their first positive LH test. But the length of the LH surge may vary from woman to woman. Learn more about how to figure out the length of your personal LH surge.
  • Basal body temperature: If you’re using a BBT thermometer alongside your Ava bracelet, you may notice that they don’t always follow exactly the same pattern. Both skin temperature and oral temperature follow a biphasic pattern around ovulation, but it can be harder to get a good reading using an oral thermometer. The temperature that Ava gives is taken from the period of time when you are in your deepest sleep, and is not affected by what time you go to bed or when you wake up (as long as you get at least four hours of sleep).

Step 2: Make sure your cycle is the right length for Ava.

Ava’s algorithm is optimized for cycles between 24 – 35 days. If your cycle is outside of that range, the fertile window and ovulation detection features may not be accurate. Of course, you can still use the other data that Ava provides to figure out for yourself when you ovulated (in other words, you can be your own algorithm!)

Step 3: Make sure Ava has the correct information about you.

If you entered the wrong average cycle length during the onboarding process, it could potentially throw off the accuracy of your first few cycles on Ava. To resolve this issue, simply enter a few periods in the past of the correct length. This will override what you entered during the onboarding process.

Step 4: Make sure you wore Ava enough nights.

In order to give an accurate prediction, Ava should be worn for at least 80% of the cycle, and 100% of the time during the fertile window.

Step 5: Make sure you’ve been using Ava long enough to get to know you.

  • If this is your first cycle using Ava: the earlier in your cycle you start using Ava, the more likely that it will be accurate on your very first cycle. But even if you start wearing Ava on the first day of your cycle, it can sometimes take some time to become attuned to your body. The learning curve is steepest between cycles one and three.
  • If this is not your first cycle using Ava: if Ava isn’t getting smarter the longer you use it, the next thing to look at is how consistently you synced Ava during your previous cycles. Did you sync Ava at least 80% of the days of your previous cycles, and 100% of the days in the fertile window? Did you continue wearing it after ovulation, during your luteal phase? If your previous cycles on Ava were not complete, it could impede the learning and improvement process.

 

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