Figure 19. Levels of serum steroidal during treatment of patients suffering of endometriosis treated with LHRH agonist using different routes of administration and formulations. (a) i.n. insufflations with buserelin; (b) s.c. injections with buserelin; (c) s.c. implants with goserelin. The shaded area represents the reference menopausal range. (From ref. 141, with permission.)