Responses of single units to visceral stimulation in different estrous stages
| Estrous stage | # of units responsive to any visceral stimulus | Cervix pressure | Vaginal distention | Uterine distention | Colon distention |
|---|---|---|---|---|---|
| D | 15 | 9 (60%) | 6 (40%) | 12 (80%) | 6 (40%) |
| P | 17 | 14 (82%) | 5 (30%) | 11 (65%) | 6 (35%) |
| E | 11 | 7 (64%) | 7 (64%) | 4 (36%)* | 4 (36%) |
| M | 13 | 7 (54%) | 6 (46%) | 9 (70%) | 4 (31%) |
| Total n(%) | 56 | 37 (66%) | 24 (43%) | 36 (64%) | 20 (36%) |
↵* P < 0.05, significantly less than D.