Williams, R. Stan; et al. (2003). "Pregnancy rates in varying age groups after in vitro fertilization: a comparison of follitropin alfa (Gonal F) and follitropin beta (Follistim)". American Journal of Obstetrics and Gynecology. 189 (2): 342–346. doi:10.1067/s0002-9378(03)00728-2. PMID14520188.
"Gonadotropins", LiverTox: Clinical and Research Information on Drug-Induced Liver Injury, Bethesda (MD): National Institute of Diabetes and Digestive and Kidney Diseases, 2012, PMID31644163, retrieved 2023-12-11
Williams, R. Stan; et al. (2003). "Pregnancy rates in varying age groups after in vitro fertilization: a comparison of follitropin alfa (Gonal F) and follitropin beta (Follistim)". American Journal of Obstetrics and Gynecology. 189 (2): 342–346. doi:10.1067/s0002-9378(03)00728-2. PMID14520188.
"Gonadotropins", LiverTox: Clinical and Research Information on Drug-Induced Liver Injury, Bethesda (MD): National Institute of Diabetes and Digestive and Kidney Diseases, 2012, PMID31644163, retrieved 2023-12-11