on my BFP cycle, at 9DPO, my P4 was 19.5 and that was after being on Crinone in the a.m. and 200 mg P4 supps at night. I was natural TI cycle so they were looking for it to be above 12 so I was good there. Point though is that even with Crinone and P4 supps it was still "only" 19.5. I think the Crinone and your body are doing very well! As others have said, Cooper is just conservative.