The letters HP are what separate this from the plain Fertigyn vial: highly purified. Additional purification steps strip out more of the co-extracted urinary protein, and that is all the designation refers to — the active hormone is unchanged.
Underneath it is human chorionic gonadotropin, 5,000 IU in one vial, freeze-dried and made up with solvent before injection. It reproduces luteinising hormone signalling in the male body, which is the reason it sits with the peptides rather than the steroids. Sun Pharma produce it for the Indian fertility market, where highly purified grades are the usual hospital choice.
