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Adult mice typically weigh about 1 ounce (28 grams) and are approximately 2.5 to 3.5 inches (6 to 8 centimeters) long, not including the tail (see Mice: Mice at a Glance ). Male mice are typically larger than females. Pet mice are available in many colors and coat patterns due to specialized breeding. Coats can be smooth, curly, longhaired or a combination. The most common color variations include brown, black, tan, gray, and albino, with lighter and darker shades of these as well. The usual life span of mice is 1.5 to 2.5 years.
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| Mice at a Glance |
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Lifespan
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1.5 to 2.5 years
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Weight
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20 to 40 grams
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Length (including tail)
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6 to 7 inches (15 to 18 centimeters)
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Normal body temperature
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98 to 101°F (36°C)
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Heart rate
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450 to 600 beats per minute
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Estrous cycle
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4 to 5 days
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Duration of pregnancy
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19 to 21 days
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Litter size
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10 to 12 young
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Weaning age
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21 to 28 days
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Last full review/revision July 2011 by Katherine E. Quesenberry, DVM, MPH, DABVP (Avian); Kenneth R. Boschert, DVM, DACLAM
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