Im not going by any studies as we are not using any pharma hmg. I can only tell about my own experience, I made a thread about recovering my fertility from start to finish (until my gf got pregnant), and all I can tell is that bloodwork only showed fsh to be elevated the next day after injection but not the 2nd next day after. Thats why I used to inject hcg and hmg daily for 5 months straight. And it worked.
So to me the minimum injection frequency is 3 times a week, more often is even better.
Also pharma rFSH and HMG are two different things. rFSH is a lot more expensive. Im not sure if you can apply the same study results from a rFSH to HMG administration.