I lean toward other blood tests during the cycle so you can monitor your progress and the impact of the AS - tests such as creatinine and hemoglobin, for example, as well as total test levels.

However, if you did not have these done prior to the cycle, then you really ave no baseline to reference (although you would be able to tell if the tests are outside normal range).

Regarding the total testosterone, this lab test can be skewed, depending on your dosing schedule. As anyone who takes test medically knows, you have two levels: peak and trough (as in a horse's trough). The peak level occurs 24-48 hours after a test injection, and the trough level occurs just before an injection. If you're shooting every seven days, for example, your trough level occurs seven days after your last injection, but before your next injection. And the difference between peak and trough levels can be very significant. Also, depending on how much test you're doing as part of a finite cycle (as opopsed to therapeutic doses), you're likely to find your total testosterone level through the roof anyway - so abnormally high that it doesn't even come close to the highest point of normal range.

(I recently experimented with this. Doing 150 mg. of test every seven days for a few weeks, I did both peak level and a trough level labwork. My trough was in the mid-300's, and my peak was in the 900 range. Quite a difference. On the other hand, when I took cycle-level doses and did labwork randomly, my level was almost 1,500.)

As far as the PSA, any change in prostate usually comes more slowly, so you should be fine waiting until, say, 30 days after your cycle. Just as important, though, is to let your doctor give you the finger (yes, the notorious DRE - digital rectal exam), since benign prostate enlargement may not show up on a PSA.