Follistim (follitropin beta) contains human follicle stimulating hormone (FSH) that is manufactured using recombinant DNA technology. Follistim AQ cartridge is a prefilled, premixed recombinant gonadotropin. Packaged in 300 IU (international units), 600 IU and 900 IU cartridges, the Follistim Pen allows the user to dial a specific dose in 25 IU increments from 50 IU to 450 IU per subcutaneous injection. It is indicated for the development of multiple follicles in ovulatory patients participating in an assisted reproductive technology (ART) program. It is also indicated for the induction of ovulation and pregnancy in anovulatory infertile patients in whom the cause of infertility is functional and not due to primary ovarian failure.