Most peptides lasted pretty long in my experience, even at room temp, so did epo and IGF. It wouldn´t surprise me if HCG would last a half a year, at least, when in solution and kept in the fridge.
Making a solution from Hydroxypropyl-Beta-CycloDextrine even prevents gropwth horomone fromm aggrevating at room temp and makes it last for at least3-4 months ()an deven well over this period), and has the ability to regenerate already degraded hgh molecules by re-folding them, due to the spefici electronegative bondings to the amino acids of the peptide.