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About the method and technology

One couple in six have hard time getting pregnant despite a year of trying. Knowing where in your ovulation cycle you are can improve your chances of getting pregnant. Babyndex combines saliva test with an app to help you get pregnant sooner with advanced but simple to use technology!

Saliva test upgraded

Your body communicates with you through crystals. While this may sound abstract, it is completely precise: when your body goes through different stages of your ovulation cycle, the changes in hormones cause that saliva starts to crystalize in different ways. Since the shapes of the crystals resemble the shape of the fern the whole procedure is called Saliva Fern Test. Using a high-quality microscope and the Babyndex app, you can detect crystals in dried saliva samples automatically and Babyndex will provide you with the dates of your fertile days immediately!

Strong scientific foundation

The effectiveness of the saliva test combined with automated crystal detection has been subjected to several scientific research. Probably the most important was the study by Harvard Medical School in 2018. Harvard researchers have concluded that the accuracy of the same solution as Babyndex is higher than 99%! Using this method, we detect oestrogen hormone increases in a much less intrusive and more affordable way than comparable urine or electrolyte tests. What is more, FDA has already approved saliva tests for ovulation prediction, which is what Babyndex is based upon.

Better solution for every couple


Urine test

  • Non-reusable
  • Non-invasive
  • Easy to interpret
  • Medium accuracy
  • Expensive


Saliva test

  • Reusable
  • Non-invasive
  • Easy to interpret
  • High accuracy
  • Affordable


Body temperature

  • Reusable
  • Non-invasive
  • Easy to interpret
  • Low accuracy
  • Affordable

Babyndex Saliva Test has strong comparative advantages over other methods of ovulation prediction. It is very easy to use and can be reused, which is not the case with urine or blood tests. This makes Babyndex very affordable. It is completely non-invasive and the results can offer extremely high accuracy (>99%).

Get ovulation prediction in seconds

We’ve made sure that Babyndex is super easy to use and it takes just a couple of minutes every day to analyze your saliva crystallization and predict your ovulation cycle! You just have to follow these 3 steps:


Place a drop of saliva on the microscope and wait for it to dry (about 10 minutes).


Hold the microscope against the camera of your mobile and take a photo with the Babyndex application.


Wait for the application to analyze crystallization and predict your fertile days.

Get app now:


*Running on iOS 11.0 or later and Android KitKat or later.