Recombinant follicle stimulating hormone made by Organon. Called Follistim in US. On an equivalent dose basis, produces serum FSH that are somewhat slower to rise than with the use of hMG preparations, but which are ultimately higher: in other words, follicles and serum estradiol levels take a little longer to respond than they do to Humegon, but the number of mature, preovulatory follicles available for egg retrieval is the same or more. Professor Jansen, medical director of SIVF, notes that 200 U (units) of Puregon per day produces a similar result to 225 U of Humegon or Metrodin. Generically known as follitropin beta. See also: Follistim

Pure FSH given to stimulate the growth of egg follicles.

Brand of gonadotropin medication (see)