I did the saliva test yesterday and got it in the mail. It is really pretty simple. First thing in the morning before eating or drinking anything---chew some gum for a few minutes and keep spitting in a little tube until it's about 3/4 full. Seal it up and mail. Mine went to Aeron Life Cycles Clinical Laboratories. They do a lot of different tests but mine was for estrogen, progesterone, testosterone and cortisol. So I should have the results in a few weeks at my next appointment. So far the hot flashes seem to be about gone, and I'm not too tired from the progesterone. I'll be really interested to see the changes on the tests and where I go from here.