At a glance
- The Ava fertility bracelet measures various physiologic parameters in the form of bracelet that is worn overnight
- Ava attempts to use data collected overnight, such as skin temperature, resting pulse rate, perfusion, and breath rate to predict the fertile window
- Ava records the temperature of the wrist every few minutes while the bracelet is worn continuously overnight
- Ava costs between $279-359, depending on if you choose the Basic, Plus, or Premium package.
- Ava does not work for women with PCOS or cycles outside of the 24-35 day range
- Ava’s temperature tracking is subject to disturbance by hand position (under blanket or outside of blanket) and by alcohol consumption.
- kegg is a fertility tracker that detects the changes in the cervical fluid to both predict in advance and show the user the full fertile window
- kegg is used for less than 2 minutes a day in a timeframe that is convenient for the user.
- Kegg’s predictive algorithm
- kegg provides fertile window predictions for cycle length averages between 21-40 days, however, women with cycles outside of this range can watch the kegg trendline to see their full fertile valley.
- With kegg, users can optimize their trying to conceive efforts by timing intercourse/insemination throughout the full fertile window
- Women with irregular cycles and PCOS have been successful with kegg
- Skin Temperature
- Resting Pulse Rate
- Heart Rate Variability
- Breathing Rate
The user wears the Ava sensor bracelet to bed overnight. In the morning, the user syncs the bracelet to the app and the app then displays your results. Ava’s algorithm predicts the 5 day fertile window based on the physiological parameters.
Unfortunately, the measurements that Ava tracks fail to directly detect the fertile window. As a result, it relies heavily on past data to guide the user as to when the fertile window is taking place, and therefore requires the user to have regular cycles.
As the fertile window opens, the cervical fluid and vaginal environment become increasingly more hospitable to sperm due to the changing make-up of the cervical fluid. As a result, the kegg readings descend on the kegg chart, forming a valley throughout the fertile window. kegg’s algorithm detects these changes in the cervical fluid and uses the past trend data to predict in advance when the fertile window will likely occur in the next cycle, allowing the user to both plan in advance, and see in real-time when their fertile window is happening.
A kegg and Ava user shared “The portability [of kegg] is FANTASTIC considering I can charge it once a week vs ava daily. I have seen a definite pattern already with kegg and my temps and kegg lines up perfectly with my Fertility Friend app.”