GNRH1 and endometriosis: Its anti-steroidogenic activity is known to relieve some of the symptoms associated with endometriosis, however substantial androgenic side effects, such as hair growth, mood changes and more seriously, liver damage and arterial thrombosis have been reported [53,54].GNRH agonists / analoguesGnRH agonists are analogs of the hypothalamic hormone GnRH.