Where'd you get that '250iu 2x/wk' number? I've been away from the game for a while, so I'm not 100% positive, but I'd use more.
The sticky at the top - "The New Post Cycle Therapy 2008".. It has this info, and I did a little other reading on other sites, and apparently the 250iu dose is all a healthy male would need to keep his systems up.. In the past they've proposed higher doses, but these were apparently based on guys that weren't healthy in that aspect to begin with. Here's what is says:
The biggest component of a fast recovery is keeping the testes active during the cycle. This is accomplished by taking hcg during cycle, not after like many people think. On cycle hcg forces your testes to continue to produce testosterone as they normally would. The trick with on-cycle-hcg use is to avoid using too much, too frequently (which can desensitize your testes). It’s important to use just enough to stimulate the testes to produce the same amount of testosterone they normally would.
For on-cycle-hcg, I recommend 250 iu’s of hcg taken twice a week from the start of your 3rd week of the cycle until two weeks before the steroids or pro-hormones clear your system (be sure to check the half lives and clearance time of the Steroids / Pro-Hormones you use as these widely vary).