Saliva fertility tester-anyone use them?

My dr mentioned the scope thing that detects changes in your saliva around ovulation. Has anyone used them? I've looked online at several sites, and I'm wondering if the results would be too obscure to do any good. Anyone know? They aren't very expensive, but if it would just cause more frustration than anything, I don't want to bother! Thanks!
Answers:

I used it and it worked for me. I used it while trying to get pregnant during 3 of 4 of my pregnancies. It only works well if you follow the instructions to a T. I just did it in the morning when I woke up so as to not have any foods interrupt it!


I HAVE USED THEM, BUT I DON'T THINK THEY WORK THAT GOOD. ACCORDING TO MINE I SHOULD HAVE GOTTEN PREGNANT LAST YEAR.

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