i would not do it throughout the whole cycle. there is no reason for that. do it in the middle of the cycle and then at the end just before clomid starts. through out is senseless. hcg is not a great drug to be using for long periods of time. it will **** you up if you do.in a 20 week cycle, i'd do it around weeks 8-10, and then again at weks 18-20. 500iu every 3-5 days is the way i go also. but i lie to do the first shot at 1000iu, then 500 till the bottle is gone.usually around three weeks. 2-5000iu bottle is good. 1 mid and 1 end. my opinion, based on my own experiences.