
I've only used the saliva test on my girls for ovulation and so far it has been 100%. There's a little device called a MateTel , you get a sample of your girls saliva on the lens wait for it to dry, fertile period= strong ferning ( or icicle) patterns cover the microscope
ovulation is about to occur . mate within 24 hours repeat mating 48hrs after 1st mating
Apparently it can also be used to tell if a bitch is pregnant, but I've not used it for that so can't say if it works or not.