Well a month ago I had a saliva test done thru Cell Science Systems. It showed normal am cortisol, and then below level low all times after that. Then I heard people were complaining saying Cell Science levels were wrong,(everyone coming back low,) So I did another test 1 month later thru ZRT. With that test I came back moringin range but high end,noon high,above range, and evening and night in range but high end. So Noe 2 tests, different results. ZRT said progesterone usage was fine and will not affect results but doc thinks otherwise. My progesterone came back way high, but it was because I was not careful and They said even if there is some cream on your skin when you do the test, touch the vial. it will give crazy high results. I had my blood progesterone testes about ,2 months ago, and it was in range but lower end. My cycle last month came 4 days early. So I am very low estrogen and I believe low progesterone as well. I will be doing another saliva test this week thru a differt lab