The best method for self-diagnosis
The phenomenon of saliva crystallization or arborization (‘fern’ phenomenon) was discovered in 1957. by C. Andreoli & Della Porta from University in Torino, Italy. This phenomenon was confirmed in many scientific papers and in clinical trials all over ther world and it has been applied in medical practice ever since.
Below you can find some of scientific paper which confirm high level of accuracy when using this method to determine fertile days:
Original research of Andreoli Cesare and Mario Della Porta from 1957 titled “Cyclic changes in female saliva” is investigating whether the changes that occur during ovulation are accompanied with the phenomenon of salt crystallization in saliva. LINK
Indian researchers Tandra Pal and Asok K Bhattacharyya from the University of Calcutta in 1989 published their work – “Cyclic changes in salivary lactate dehydrogenase, peroxidase and leucine aminopeptidase during menstrual cycle”. LINK
Hugh Melnick and Vasilios Theodoros Goudas, American scientists, in 2015 published “The detection of a salivary Ferning pattern using the Knowhen ovulation monitoring system as an indication of ovulation”. LINK
