Clinical application value of embryo densification during frozen ⁃ thawed embryo transfer cycle 
JIA Junlong, CHENG Yaoping, WANG Ling, YU Yan, SUN Yang, LÜ Aixia, MA Xiaoyan.
The Journal of Practical Medicine . 2023, (9): 1118 -1122 .  DOI: 10.3969/j.issn.1006⁃5725.2023.09.009