KNOWHEN(R) Saliva Fertility Monitor
While most apps and monitors use data that tracks a woman’s temperature fluctuations to pinpoint her most fertile times, this fertility monitor does things a bit differently. It uses — wait for it — your spit. Apparently, the salt in a woman’s saliva actually changes when she ovulates, so the Saliva Fertility monitor gives you the tools you need to spit on a slide, look at it under a microscope, and see for yourself if you are ovulating. Crazy.
See More At: Everyday Family