Salt crystals in saliva

Salt crystals in saliva

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To find out her monthly fertile period, a woman can buy different types of tests. One of these tests is the one based on saliva. The sellers claim that if you observe a drop of dried saliva under a mini-microscope (the test itself) and you can see fern-like structures (like the ones in the image) the person the saliva belongs to is fertile. These structures are nothing else but crystalized salt. In the period leading to ovulation, it seems that the sodium level of a woman’s body increases. However, the accuracy of this kind of test remains controversial for the moment.