Table 1 Profiles of pregnancy in the groups of dams exposed to 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin (TCDD) or 3, 3′, 4, 4′, 5-pentachlorobiphenyl (PCB126)
From: Learning behavior in rat offspring after in utero and lactational exposure to either TCDD or PCB126
Groupsa | Number of dams | Length of pregnancy (days) | Body weight of dams (g) | Number of pups | Sex ratiob | ||
|---|---|---|---|---|---|---|---|
Male | Female | ||||||
Control | 7 | 21.8 ± 0.5 | 333.8 ± 17.2 | 15.4 ± 1.1 | 6.6 ± 2.0 | 8.8 ± 1.9 | 0.83 ± 0.39 |
TCDD 50 | 8 | 21.6 ± 0.5 | 331.6 ± 21.1 | 11.0 ± 3.7 | 4.9 ± 2.1 | 6.1 ± 3.3 | 1.15 ± 0.75 |
TCDD 200 | 6 | 21.2 ± 0.4 | 341.8 ± 31.8 | 10.8 ± 4.5 | 5.2 ± 3.5 | 5.7 ± 1.8 | 0.88 ± 0.72 |
TCDD 800 | 6 | 21.5 ± 0.5 | 348.8 ± 25.6 | 13.0 ± 1.9 | 7.2 ± 1.6 | 5.8 ± 2.4 | 1.56 ± 1.05 |
PCB126 500 | 8 | 21.7 ± 0.5 | 327.6 ± 44.4 | 14.3 ± 1.3 | 7.9 ± 1.5 | 6.4 ± 1.4 | 1.18 ± 0.43 |
PCB126 2000 | 8 | 21.3 ± 0.7 | 337.0 ± 31.7 | 13.8 ± 2.1 | 7.8 ± 2.1 | 6.0 ± 1.9 | 1.19 ± 1.41 |
PCB126 8000 | 8 | 21.4 ± 0.5 | 343.4 ± 35.6 | 14.1 ± 2.3 | 7.6 ± 1.8 | 6.5 ± 1.7 | 1.17 ± 0.34 |