Table 6. Comparison of mitochondrial membrane potential levels in oocytes ($\overline{x}\pm \text{ s}$).

Groups	Number	Normal group	Natural aging non-intervention group	Natural aging intervention group
ΔΨm	5	1.05 ± 0.33	0.28 ± 0.02★★	0.40 ± 0.01★★

^★P < 0.05 compared with normal group, ^★★P < 0.01 compared with normal group, ^▲P < 0.05 compared with non-intervention group, ^▲▲P < 0.01 compared with non-intervention group.