I am three cycle down and I have noticed a trend with me and test. I have never ran anything higher than 500mg/week. What I noticed is, when I start to take it in my libido goes great for about the third to seventh week, and then it just cuts. I have have a hard time getting it up. Then when I start clomid post cycle. I'm up and running in a few days. Why do I have this **** time after week 7?