It can take 16 to 30 days for a hamster to have babies. The Syrian hamster gestation period takes around 16 days, and the gestation cycle for a dwarf hamster can take up to 30 days.
The time it takes for the actual process of birth depends on the size of the hamster's litter. A pup is born every 10 to 30 minutes, and the mother hamster dozes between new arrivals. The average litter ranges from three pups to as many as 12 newborn hamsters. It can take a hamster around five hours to give birth to a total of 10 pups.