@davederousseau
We did one test 3 weeks after previous one to have results confirmed and ready. But we were doing monthly tests from the beginning and we saw the trend and short doubling time so 3 weeks was "long" period in our case. In my opining having extra data and fresh draw can not be bad thing to do, BUT many would say that it was overkill - I personally do not think so. I wanted to make sure that my husband gets treatment started BEFORE PSA hits 0.2.

Wishing you all the best and super successful salvage treatment 🍀