Results: Salivary ferning test by KNOWHEN ovulation microscope is accurate method of detecting ovulation. Its accuracy was 86.5%. Conclusions: Salivary ferning test is a reliable test to detect fertile period of menstrual cycle.

How do I know if my saliva is ferning?

You put some of your saliva on a glass slide, allow it to dry, and look at the pattern it makes. You will see dots and circles, a fern (full or partial), or a combination depending on where you are in your monthly cycle.

How reliable are saliva ovulation tests?

The smartphone-based device was able to detect ovulation with an accuracy of 99.5% when tested with 200 images of human saliva collected during the ovulating and non-ovulating phases of the menstrual cycle among 6 women.