BBB scores in each group of mice at different time points. Two weeks after hUC-MSC transplantation (3 weeks after SCI), each group of mice underwent BBB (Basso, Beattie, and Bresnahan) test every alternate week (5, 7, and 9 weeks after SCI). Compared to the model group, the BBB scores of the treatment group were significantly increased at 3, 5, 7, and 9 weeks (P < 0.05 or P < 0.01; n = 8/group). Data are expressed as the mean ± SD, and repeated measures analysis of variance (ANOVA) and Tukey's one-way analysis of variance for post hoc testing were used for analyses. ∗∗P < 0.01; ∗P < 0.05. hUC-MSCs: human umbilical cord mesenchymal stem cells; BBB: Basso, Beattie, and Bresnahan.