These figures are all for the Golden Hamster, but are probably pretty close to any other breed of hamster:
Puberty: 4-5 weeks
Optimum beginning breeding age:
males: 10-12 weeks
females: 16-20 weeks
Estrus: Every 3-4 days
Gestation period: 16-18 days
Litter size: 1-18 (average is about 8)...
