Evaluation of GnRH antagonist pretreatment before ovarian stimulation in a GnRH antagonist protocol in normal ovulatory women undergoing IVF/ICSI: a randomized controlled trial. - Zhang, Yisheng; Liu, Liling; Qin, Jie; Huang, Hongyi; Xue, Lintao; Wang, Shikai; Tan, Weihong (Reproductive Biology & Endocrinology, 2021)