Table 3. The reproductive outcomes of the rat parents given the five drinking waters.
| bPW | bMW | bNW | FTW | TW | P | |
| No. of rats (male/female) | 30/15 | 30/15 | 30/15 | 30/15 | 30/15 | |
| Copulation index (%)a, male | 100 (15/15) | 100 (15/15) | 100 (15/15) | 100 (15/15) | 100 (15/15) | 1.00 |
| Copulation index (%)a, female | 100 (30/30) | 100 (30/30) | 97 (29/30) | 100 (30/30) | 100 (30/30) | 1.00 |
| Maternal Fertility index (%)b | 67 (20/30)* | 100 (30/30) | 83 (24/29) | 73 (22/30) | 100 (30/30) | 0.00 |
| Maternal Gestation index (%)c | 100 (20/20)* | 100 (30/30)* | 100 24/24)* | 100 (22/22)* | 87 (26/30) | 0.01 |
| Gestation length (days)d | 22 (0) | 22 (0) | 22 (0) | 22 (0) | 22 (1) | 0.13 |
aCopulation index (%) = (no. of animals with successful copulation/no. of animals paired) × 100.
bFertility index (%) = (no. of animals with pregnant/no. of animals with successful copulation) ×100.
cGestation index (%) = (no. of females that delivered live pups/no. of pregnant females) ×100.
dValues are given as the median (interquartile range).
*p<0.05, statistically significant difference from TW group.
Abbreviation: bMW, bottled mineralized water; bNW, bottled natural water; bPW, bottled purified water; FTW, filtered tap water; TW, tap water.