In the same group at different ages: the relative expression of BMP-2 mRNA in thoracic vertebra tissue at 30 days of age in the CHF group and BPs-H and BPs-M groups was higher than that at 60 days of age, the CHF-H, CHF-M, and BPs-M groups were significantly higher at 30 days than at 60 days (p < 0.05). The gene discussed is BMP2; the disease is congestive heart failure.