Case report, 104-107 | DOI: 10.53260/grem.201026 Successful conception following pulsatile GnRH in a PCOS patient after failed ovulation induction using letrozole: a case report Zhuli Dou, Xiangyan Ruan, Binhong Wang, Rui Ju, Shuang Qin, Lingyan Zhang, Alfred O. Mueck