GNRH1 and ovarian carcinoma: The authors did not suggest an increased ovarian cancer risk associated with the use of gonadotropins (RR 0.83; 95% CI: 0.50-1.37), CC (RR 1.14; 95% CI: 0.79-1.64), hCG (RR 0.89; 95% CI: 0.62-1.29), or gonadotropin releasing hormone (GnRH) (RR 0.80; 95% CI: 0.42-1.51).