For reference:
I'll try making my point via a question, rather than a statement.
Look at the Pregnyl HCG 5,000iu kit pictured above. There are 2 ampoules. 1 contains the freeze dried powder disk of 5,000iu, the other contains 1 ml of solvent. The amp with the hcg powder disk in it is mostly empty. The powder comes up to about the very bottom writing on the lowest part of the label - the rest of the amp is all air - enough dead space to allow you to draw the solvent out of its amp, and then inject it into the powder amp, making 1 ml of hcg containing all 5,000iu of hcg mixture.
Now, after that process is complete, you have the one amp, with the 1ml of solvent mixed with the 5,000iu of hcg.
If you take your 1ml insulin syringe (the one marked with 1ml=1cc=100iu) and use it to draw out that 1ml of mixture you just made, it will fill your slin pin to that mark.
QUESTION: How many iu of HCG will you have in that filled slin pin?
A) 5,000iu
B) 100iu