GNRH1 and Infertility: In the past seven years, the GnRH-a prolonged protocol has been widely used in our center for patients with different causes of infertility, accounting for 60%–70% of treatments each year, for a fresh-ET rate per stimulation cycle of over 70%, and for a high clinical pregnancy rate of 68% in 2015 [14, 15, 17, 20].