Length of time for gains from IGF

How long before one normally starts getting diminishing returns from IGF? I just finished two vials, but my gains were still coming if not accelerating.

I had been measuring wrong at first so I was taking 80-120 mcg per day for about two weeks instead of 40-60--didn't figure that out until near the end of the first vial which ended quickly (which was why I took a closer look at the pins I was using--yes, I should have looked closer to begin with but, hey, what's done is done). So I started using the lower dosages, and as I continued, the gains I got seemed to get better and better. If I hadn't run out, I'm wondering if I could still be taking IGF for a while (I've was on it for six weeks already). I think I saw that most people on the board here take it for 4 weeks and then they said their gains stopped or slowed way down.

Aside from the money, should I continue using it? I think I could make some really good gains still for another month at least. Or should I wait and mature the new muscle and do it again later?

in my experiece igf-1 gains increase in weeks 3 and 4 but i usually end my cycle after 4 weeks. this is the point of diminishing returns b/c igf-1 binding proteins will begin to bind to the lr3igf-1 rendering it ineffective after 4 weeks. at least a 4 week break should be taken between cycles

Maybe that point was coming later for me then because I was about on six weeks and still going strong. Even so, I think I'll give myself four weeks before trying it again. Thanks for the input.