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Background: Plastin 3 (PLS3) gene is located on the X chromosome, encoding the actin-binding protein plastin 3,the protein is a member of protein family which responsible for the dynamic assembly and disassembly of actin cytoskeleton, recent studies found that mutations of the gene can lead to osteoporosis and fractures, and somewhat verified in the Rotterdam study population.The purpose of this study was to investigate the relationship between bone mineral density and PLS3 gene polymorphism and the risk of osteoporotic fractures in Chinese postmenopausal women.