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app and microscope


app & microscope

Know your fertile days from saliva crystals

On fertile days, air-dried saliva crystallizes for most women. With an ovulation microscope you can find out when there is a high chance of getting pregnant. Babyndex is the first and only app that can help recognize these crystals.

What is Babyndex?

ovulation microscope


Saliva starts to crystalize when you hit your fertile period. Apply a little saliva to the lens of the microscope that we supply and wait for it to dry.

mobile application


Download the application on your smartphone, hold the microscope against the camera and take a picture of the saliva sample. The app recognizes the saliva crystals.

ovulation prediction

Fertile days

Our algorithm analyzes the saliva patterns and determines the probability of crystals. You can better understand your ovulation cycle.

Who can use Babyndex?

The fertile window is the five days before ovulation and the day of ovulation. Women are most fertile two days before ovulation, when they have half the chance of getting pregnant in their twenties. On the day of ovulation, however, that chance is only a tenth. The most commonly used urine and temperature tests predict ovulation only 1 day, while the ovulation microscope predicts it 2-3 days ahead. The Babyndex app is designed to help you use your microscope so you can predict ovulation as accurately and early as possible.


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 our high-quality microscope and the Babyndex app, you can detect crystals in dried saliva samples automatically and Babyndex will provide you with the actual 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 is the study by Harvard Medical School from 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 test for ovulation prediction, which is what Babyndex is also based upon.

Better solution for every couple


Urine LH test


Saliva fern test


Body temperature test

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 minutes

We’ve made sure that Babyndex is super easy to use. Take the test every day for full cycle and then regularly during the expected fertile phase. It takes 3 steps and a few minutes of your time to analyze your saliva crystallization and predict your ovulation:

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