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🌿 Track smarter, plan better—your fertility, redefined.
The KNOWHEN® Saliva Ovulation Tests Kit offers a clinically validated 98.9% accurate, non-invasive way to predict ovulation using patented U.S. saliva technology. Designed for ease and hygiene, it replaces messy urine tests with a simple daily saliva sample viewed under a built-in microscope to detect fern-like patterns signaling peak fertility. Ideal for natural family planning, this trusted fertility tracker combines scientific precision with user-friendly design.












| Best Sellers Rank | #307,114 in Health & Household ( See Top 100 in Health & Household ) #82 in Ovulation Tests |
| Customer Reviews | 3.6 out of 5 stars 18 Reviews |
Z**B
Good gadget to have.
This has helped me so much to keep track of my fertility naturally.
S**.
Made cheap and fell apart immediately
Technically it works, but it is soooo cheap, the lens fell off the first day, it was glued on really poorly. And the light mechanism is so finicky, it doesn't work how it’s supposed to at all. At the time of purchasing this, this product was the only ovulation microscope available, and too bad because it’s very low quality. I will be looking for another one thats made better.
A**N
Works, but cheaply made
It does what it’s supposed to do but it is extremely cheaply made with flimsy plastic and it is difficult to turn the light off. I do appreciate the extra batteries being included. The packaging had clearly been open, however, the item appeared unused so I did not return it. Shipping ended up being much later than it was promised to be delivered by.
T**Y
Would buy again
Great for dogs
L**A
AMAZING SERVICE🫰🏼
I bought this product to better understand my cycle and support my fertility journey, and I was honestly impressed. From the very first month, I was able to clearly identify my fertile days thanks to the accurate and easy-to-read results. I also loved how complete the kit is!!
C**A
To fragile
To fragile has broken twice one me and I can’t get my money back now.
T**.
Died immediately
The light inside died after 1 week, rendering it useless.
M**T
Not worth it
Battery dies incredibly quickly.
Trustpilot
5 days ago
3 days ago