Prefilled hcgPrefilled hcgIn the spirit of the latter, we offer some guidelines on buying HCG on the Internet. . Ovidrel® (choriogonadotropin alfa) is a highly purified form of recombinant human chorionic gonadotropin (r-HCG). 99. Other brands are provided in single-dose prefilled syringes. world-pharma. Ovidrel ® PreFilled Syringe (choriogonadotropin alfa injection) is a sterile liquid preparation of choriogonadotropin alfa (recombinant human Chorionic Gonadotropin, r-hCGBuy HCG Injections ... more