

FAQ
How accurate is femSense?
How many patches do I use per cycle?
Who can use femSense?
How does the femSense patch work?
How does femSense know when I am fertile?
Track and confirm ovulation with the femSense ovulation tracker patch and app.
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Confirms ovulation with 99.73% accuracy
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Over 14,000 reported pregnancies while using the system*
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Includes the free femSense app
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Over 650 5-star reviews**
Based on the well-known temperature method, femSense ovulation tracker temperature patch measures your body temperature during your fertile window, the algorithm interprets the temperature measurements, and the app gives you daily updates on your fertility status. When used correctly, femSense predicts and confirms ovulation with 99.73% accuracy.
* 14,000 babies born to women in the European Union who used femSense to identify their ovulation. Reported using the femSense app.
For all orders exceeding $75 USD, shipping is offered for free. Otherwise, standard shipping charges apply.
Returns will be accepted for up to 60 days from receiving your tracking number. Please contact us at orders@femsenseus.com to initiate your return.
Check out our delivery Terms & Conditions for more details.
Compare femSense with other fertility trackers.
femSense |
Temperature Method |
Ovulation Strips (LH tests) |
Tracking Apps | |
Confirms Ovulation |
99.3% accurate |
78% accurate |
97% accurate |
21% accurate |
Predicts Ovulation |
Yes |
No |
No |
Yes |
Measurement Method |
Continuous measurement |
Take temp multiple times |
Pee on a stick for 5 or more days |
Guess your cycle |
Hygienic & non-invasive |
Yes |
Yes |
No |
Yes |
Simplicity of Use |
Yes |
No |
No |
Yes |
Track Symptoms & Health |
Yes |
No |
No |
Yes |
See Stats & Patterns |
Yes |
No | No | Yes |
Success Stories
Using the femSense System

1 - Download the app
When you buy your patches, download the app. Register and enter the required details in the app so that it can predict your fertile days and notify you when it is time to apply the patch.

2 - Apply the patch
The patch will measure your temperature continuously until it has measured and confirmed ovulation. The patch should be read twice a day so that the app always has the most recent data measurements.

3 - Confirm fertility
The patch will measure your temperature continuously until it has measured and confirmed ovulation. The patch should be read twice a day so that the app always has the most recent data measurements.