Scans were collected biweekly beginning at 4.5 weeks of age until 16.5 weeks of age in wild-type mice (circles; solid line), Sost−/− mice (triangles; dotted line), Lrp5−/− mice (inverted triangles; dashed line), and Sost−/− Lrp5−/− double knockouts (squares; interrupted dashed line). *P < 0.05, significant difference from wild-type mice; †P < 0.05, significant difference from Lrp5−/− mice; ‡P < 0.05, significant difference from Sost−/− mice, using repeated-measures analysis of variance (ANOVA). For each group, n = 9 to 14 mice.