I'm not sure that your statements are exactly accurate. Ultrsensitive PSA is a fairly exacting science, under some fairly rigid standards. I think it is we who cause variations, not the lab or labs. Worried Guy is on the money. Testing same time of day, same dietary routine, same lab, etc. I have been reading these posts for quite a while and I have not seen wild flucuations of ultrasensitive PSA testing.
That being said, certainly a fluctation of .01 is possible at that level based on multiple reasons. I would say that relaxing for another 3 months, (I know how hard it is), is the best advice anyone can give.
Until you see a flucuation of .1, then enjoy your stay in the zero club.
Age 58, PSA 4.47 Biopsy - 2/12 cores , Gleason 4 + 5 = 9
Da Vinci, Cleveland Clinic 4/14/09 Nerves spared, but carved up a little.
0/23 lymph nodes involved pT3a NO MX
Catheter and 2 stints in ureters for 2 weeks .
Neg Margins, bladder neck negative
Living the Good Life, cancer free 6 week PSA <.03
3 month PSA <.01 (different lab)
5 month PSA <.03 (undetectable)
6 Month PSA <.01
1 pad a day, no progress on ED. Trimix injection
No pads, 1/1/10, 9 month PSA < .01
1 year psa (364 days) .01
15 month PSA <.01