Telomerase deficiency does not further reduce the low birth rates of ATRS/S mice
| Genotype | Number of mice (percentage) |
| ATR+/+/G3 Terc+/−* | 18 (15.5) |
| ATR+/+/G3 Terc−/−* | 23 (19.8) |
| ATR+/S/G3 Terc+/−* | 30 (25.9) |
| ATR+/S/G3 Terc−/−* | 32 (27.6) |
| ATRS/S/G3 Terc+/−* | 7 (6.0) |
| ATRS/S/G3 Terc−/−* | 6 (5.2) |
| Genotype | Number of mice (percentage) |
| ATR+/+/G3 Terc+/−* | 18 (15.5) |
| ATR+/+/G3 Terc−/−* | 23 (19.8) |
| ATR+/S/G3 Terc+/−* | 30 (25.9) |
| ATR+/S/G3 Terc−/−* | 32 (27.6) |
| ATRS/S/G3 Terc+/−* | 7 (6.0) |
| ATRS/S/G3 Terc−/−* | 6 (5.2) |
Table indicates the number of mice born for each genotype from a total of 19 ATR+/S/Terc+/− × ATR+/S/G2 Terc−/− crosses. Statistical analysis using χ2 test is shown for comparison of G3 Terc+/−* versus G3 Terc−/−* for each ATR genotype. Parents were ATR+/S/Terc+/− × ATR+/S/G2 Terc−/−. Mean litter size was 4.8 pups. The total number of mice studied is 116. P = 0.435 comparing ATR+/+/G3 Terc+/−* with ATR+/+/G3 Terc−/−*; P = 0.799 comparing ATR+/S/G3 Terc+/−* with ATR+/S/G3 Terc−/−*; and P = 0.593 comparing ATRS/S/G3 Terc+/−* with ATRS/S/G3 Terc−/−*.