Association Between Circulating Essential Metals and Pregnancy Loss: A Systematic Review and Meta-Analysis - Liqin Wen; Meiqi Ren; Liantong Wang; Jinhua Cheng; Haoqing Liang; Haochen Ai; Yuxin Yao; Shuying Lin; Zhekai Cui; Xiao Shi (Journal of Trace Elements in Medicine and Biology, 2026)