GnRH2 has been detected in endometrial carcinomas (45), whereas GnRHR2 mRNA is present in both endometrial carcinomas (45) and endometrial cancer cells (HEC-1A, HEC-1B, HHUA, and Ishikawa (18, 19, 48; Table 1)). Here, GNRHR2 is linked to endometrial carcinoma.