Single-cell transcriptomic characterization of sheep conceptus elongation and implantation oleh Gong-Xue Jia, Wen-Ji Ma, Zhao-Bo Wu, Shuang Li, Xiao-Qian Zhang, Zhen He, Shi-Xin Wu, Hai-Ping Tao, Yi Fang, Yong-Wu Song, Shang-Rong Xu, Xiao-Qun Wang, Qi-En Yang