Israel’s Salignostics has developed Salistick, the world’s first and only saliva-based rapid pregnancy test kit. It detects the pregnancy hormone β-hCG and delivers a test result in 10 minutes. Another of Salignostics kits, SaliCov, detects Covid-19 from saliva in just 15 minutes.
https://www.calcalistech.com/ctech/articles/0,7340,L-3922310,00.html
https://www.salignostics.com/salistick/
https://nocamels.com/2021/11/salignostics-world-first-saliva-based-pregnancy/