Ah my bad. What I meant when I said, "Though 3.7mg doesn't go into 10IU (so figure that one out)," I wanted you to do the math and figure it out. lol.
Anyhow, here they are:
GenHeal = 2.5IU per MG.
GenSci = 2.7IU per MG.
Humatrope = 3IU per MG.
The Humatrope being the more potent of the 3 (more IU) per MG.