Transfer of fresh versus frozen embryos in ovulatory women

Yuhua Shi, Yun Sun, Cuifang Hao, Heping Zhang, Daimin Wei, Yunshan Zhang, Yimin Zhu, Xiaohui Deng, Xiujuan Qi, Hong Li, Xiang Ma, Haiqin Ren, Yaqin Wang, Dan Zhang, Bo Wang, Fenghua Liu, Qiongfang Wu, Ze Wang, Haiyan Bai, Yuan LiYi Zhou, Mei Sun, Hong Liu, Jing Li, Lin Zhang, Xiaoli Chen, Songying Zhang, Xiaoxi Sun, Richard S. Legro, Zi Jiang Chen