Average male body weight: 2 - 5.5 pounds
Average female body weight: 1.5 - 2.5 pounds
Puberty: 240 - 250 days
Sexual maturity: 9 - 12 months
Breeding season: March - August
Type of estrus cycle: polyestrus
Duration of estrus: prolonged
Type of ovulation: induced
Time of ovulation: 30 - 40 hours after copulation
Length of gestation: 42 days
Litter size: 2 - 17 days (8 on average)
Weight at birth: 8.5 grams (.02 pounds)
Eyes open: 30 - 35 days
Ears open: 30 - 35 days
Eruption of teeth: 10 - 14 days
Weaning age: 6 - 8 weeks
Rectal temperature: 100 - 104 degrees Fahrenheit
Optimal housing temperature: 60 - 70 degrees Fahrenheit
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