HCG most typically comes as a white power in a small ampule, and is dosed at 5,000 or 10.000 iu's. You mix it with 1-2 cc's of water, load it into a syringe, and do multiple injects. 5,000 iu's mixed as 2 cc would give you 10 shots of .2cc that are 500 iu each, a good daily dose of HCG (.4cc would be 1000 iu).
I have never heard of HCG that comes as only 250 i.u. Something does not sound right.