| Reproductive parameter in Wamba forest | |||
| Group | Mean inter birth interval | Mean interval between live births | |
| E1 group (1974-96) | 4.8 years (n = 18) | 5.2 years (n = 15) | |
| E2 group (1976-89) | 4.3 years (n = 14) | 4.4 years (n = 13) | |
| Toal | 4.6 years (n = 32) | 4.8 years (n = 28) | |