Table 3.
Measures of Fertility and Fecundity
| C57BL/6 | |||||||
| Control | EE 0.01 | EE 0.1 | EE 1.3 | BPA 0.03 | BPA 0.3 | BPA 30 | |
| No. Breeding Pairs | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| No. litters born | 3 | 1 | 0 | 0 | 3 | 3 | 4 |
| Mating index (%) | 100 | 100 | 20 | 100 | 100 | 100 | 100 |
| Fertility index (%) | 60 | 20 | 0 | 0 | 60 | 60 | 80 |
| Precoital time (da) | 2.0 ± 0.8 | 3.0 ± 0.0 | 3.0 ± 0.0 | 3.8 ± 3.0 | 2.2 ± 0.8 | 2.2 ± 1.5 | 1.8 ± 0.5 |
| Gestation (da) | 19.0 ± 0.0 | N/A | N/A | N/A | 19.0 ± 0.0 | 18.7 ± 0.6 | 19.0 ± 1.0 |
| Pups per litter | 7.7 ± 1.2 | 4.0 | 0.0 | 0 | 8.0 ± 0.0 | 7.0 ± 0.0 | 6.8 ± 3.2 |
| % Males | 50.0 ± 10.1 | 50 | N/A | N/A | 50.0 ± 17.68 | 40.0 ± 18.7 | 37.2 ± 10.2 |
| CD1 | |||||||
| Control | EE 0.01 | EE 0.1 | EE 1.3 | BPA 0.03 | BPA 0.3 | BPA 30 | |
| No. Breeding Pairs | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| No. litters born | 5 | 3 | 0 | 0 | 3 | 3 | 4 |
| Mating index (%) | 100 | 80 | 60 | 40 | 80 | 80 | 100 |
| Fertility index (%) | 100 | 75 | 0 | 0 | 75 | 75 | 80 |
| Precoital time (da) | 2.6 ± 0.5 | 2.3 ± 0.5 | 7.2 ± 3.3 | 7.3 ± 6.5 | 4.2 ± 3.3 | 4.4 ± 3.1 | 2.2 ± 0.8 |
| Gestation (da) | 18.6 ± 0.5 | 18.5 ± 0.7 | N/A | N/A | 19.0 ± 0.0 | 19.0 ± 0.0 | 19.0 ± 0.8 |
| Pups per litter | 8.4 ± 3.5 | 10.0 ± 3.0 | N/A | N/A | 10.0 ± 4.0 | 10.0 ± 1.7 | 8.0 ± 4.8 |
| % Males | 34.9 ± 12.7 | 44.0 ± 18.7 | N/A | N/A | 50.5 ± 29.3 | 45.4 ± 30.0 | 31.7 ± 19.9 |
Values represent mean ± SD where relevant; Mating index (%) = No. copulation plug positive females / No. females paired X 100; Fertility index (%) = No. females with live litters / No. copulation plug positive females X 100; Precoital time = days from introduction of mating pairs to observation of copulation plug.