My buddy actually mixed the whole 10,000 IU solution together, then drew up half in one sryinge, and the other half in another syringe. He shot the one and then put the other one in the fridge and waited a week. If your planning on doing ed injects with the Human Chorionic Gonadotropin (HCG), then you might want to pre-load a bunch of slin pins and put them in the fridge.
I know Lawnsaver and DG use Human Chorionic Gonadotropin (HCG) a lot and have some good experience with it, lets wait and see what they have to say.