The body mass index and the risk of ectopic pregnancy: a 5-year retrospective case-control study. - Ji, Jin-Shuang; Liu, Ling; Huang, Huan; Chen, Hong-Wei; Xiao, Li; Lu, Xiang-Yi; Ni, Yang-Yang; Jia, Wen-Juan; Huang, Lei (BMC Pregnancy & Childbirth, 2024)