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2-3 weeks and they have 2-6 babies good luck = )--Update--I've bred tons of Dwarf Hamsters so I know it's about 3-4 weeks. Usually on the 21st-28th day.They can give birth to 1 to 9. 9 and up is...
It depends on the hamster really but I have 3 Russian dwarf campbells and two of them are so active during the early and late hours that they can spend all day sleeping and only wake up for a drink...