Has anyone ever done a progesterone pool? The idea is to take blood 3 days between 5-9dpo and average the values. My first one was goodish, but it went downhill from there: 11.2 - 9.8 - 6.7. It was either 6-8dpo or 7-9dpo. I've never gotten a value so low! I know it is supposed to go down when AF is impending, but I have a 14 day LP and never spot beforehand.

If anyone else has had it done, what were your values?