Mice at a Glance
Life span | 1.5 to 2.5 years |
Weight | 20 to 40 g |
Length (including tail) | 6 to 7 in (15 to 18 cm) |
Normal body temperature | 98°F to 101°F (36°C to 38°C) |
Heart rate | 450 to 600 beats per minute |
Estrous cycle | 4 to 5 days |
Duration of pregnancy | 19 to 21 days |
Litter size | 10 to 12 young |
Weaning age | 21 to 28 days |