When should I have Blood work done?

[JT929]

23y
5'11
210lbs
8%

Previous cycles
First- Test E 500/wk 12 weeks
Second- Test E 750/wk + Deca 600 = Nolva PCT
Current- Test E 750wk + Tren E 600wk + Caber .25mg 2x/wk + Adex .25mg ED
I Started 3/31/13. When should I have blood work done to make sure my levels are in check?

 

[living good]

before starting , mid way through and 6-8 weeks after pct