From what I understand, normally the testes produce about 28-49mg of test per week, and when using AAS, the body gets used to getting about 500mg per week, therefore temporarily shutting down the testes until AAS use is discontinued for at least 4 weeks so that the testes can resume normal production. Is an anti-estrogen neccessary for normal production? In all my research, I've never even seen the suggestion that AAS can do permanent damage to the testes. I have been off my 2nd cycle for 6 weeks now and used nolva throughout, and it feels like my sex drive has diminished and basically sex doesn't feel as good at my "climax". I start a new cycle in 2 weeks and I was just wondering if I should goto the doc before to make sure everything's working ok. Would it be safe to get a blood sample taken without hinting that I've experimented with AAS? Thanks.