Menstrual cycle lengths and bone mineral density: a cross-sectional, population-based study in rural Chinese women ages 30-49 years

Ouyang F, Wang X, Arguelles L, Rosul LL, Venners SA, Chen C, Hsu Y-H, Terwedow H, Wu D, Tang G, Yang J, Xing H, Zang T, Wang B, Xu X. Menstrual cycle lengths and bone mineral density: a cross-sectional, population-based study in rural Chinese women ages 30-49 years. Osteoporos Int. 2007; 18(2): 221-33.