GNRH1 and exstrophy-epispadias complex: The findings indicated that the letrozole+GnRH antagonist/agonist protocol and successful live birth were independently associated with a decreased risk of EEC recurrence after IVF (HR: 0.1, 95% CI: 0.011–0.882, p = 0.038, HR: 0.28, 95% CI: 0.082–0.962, p = 0.043, respectively).