No, it's for people that ovulate as well.
I ovulate normally and have regular AF's, all come like clockwork, but the problem is DH's sperm is too low. The RE is trying to make up in some way by having more than one egg mature and be released, which is why I'm taking clomid and trigger shot.
Haven't had much luck yet though, as this is my upcoming IUI #3.
So I'm thinking in your case, HCG shot would be to trigger ovulation earlier in your cycle, I'm not sure if you would get Clomid, though. Good luck!