The ABP is pretty good in theory, but how well does it work in practice? Kreuziger got out of a sanction, there's plenty of scientific literature criticising it, we've seen the highly suspicious self published blood values of Horner from the 2013 Vuelta remain unsanctioned, Juanjo Cobo as mentionned above...
It only applies to the pros too, so you could try to establish an artificially high baseline on younger athletes by using blood doping before they are enrolled.
Regarding testosterone, afaik the isotope ratio test is not used routinely because it's expensive, it's more of a "smoking gun" when suspicions are high because of a high T/E ratio or of anomalies in the steroid module.
I don't know much about the Kreuziger case - is there a link to the details such as the blood values & most importantly the Off-scores? I'm assuming his Off-scores didn't meet the 99.99% specificity that warrants a ban (I believe the threshold is it has to be
less than 1 in 10,000 chance of being undoped).
On Horner, his Off-scores didn't come close enough for the 99.99% specificity threshold (that's probably why he self-published his blood values. Lol).
On Cobo, about a year ago or so I posted a link on the PDF of his CAS hearing that gave all the details of the case including his blood values & Off-scores. The anti-doping experts that handled his case explain why the long delay. The Off-scores from the around of the time of & during the Vuelta were high enough for a sanction. The details of the delay is long & complicated (if you've got the time & some good tea/coffee to drink, it's an interesting read).
And are you saying the CIR test for testosterone is
not routinely used? I would think the top riders from the GC, classics & especially the sprinters would be subjected to routine CIR testing? That's how they busted
Justin Gatlin - a U.S. world-class 100m/200m T&F sprinter & Olympic medalist. WADA didn't wait for any suspicious T/E ratios - they hit him head on with CIR testing. And his excuse was that his masseur must have used Androgel during his rub downs. LOL
And what do think about the
Sample Retention and Further Analysis (SFA) which allows samples to be stored for up to
10 years for future testing? (subject to retesting as new technology becomes available). It's already been used in retesting samples years later from past Olympic events where they've nailed numerous athletes with positive findings. Here's an interesting study on SFA's effect as a deterrent in doping:
If Pogacar is biologically doping, I'm sure this would have to rest heavily on his mind?