Does the weekend matter? evaluating the weekend effect on pregnancy outcomes in first-cycle fresh IVF/ICSI embryo transfers: a retrospective study. - Yang, Tianli; Yang, Yuanyuan; Hou, Zhaojuan; Chang, Tianli; Liu, Nenghui; Liu, Donge; Li, Yumei; Zhao, Jing; Zhang, Qiong; Yao, Zhongyuan; Tian, Fen; Li, Yanping (BMC Pregnancy & Childbirth, 2025)