The cycle of hamsters from pregnancy to delivery typically lasts 15-22 days, with the exact duration varying by breed, age, and individual differences. Below is a detailed breakdown:

I. Gestation Period Differences by Breed
Syrian Hamsters (Golden Hamsters)
Average gestation period: 16-18 days.
Delivery may occur as early as day 15, and no later than day 22 at the latest.
Dwarf Hamsters
Their gestation period is slightly shorter, usually 15-18 days, though it may extend to 22 days in extreme cases.
II. Factors Affecting Delivery Time
Age: First-time pregnant hamsters or elderly females (over 18 months old) may have a delayed gestation period, which could last up to 30 days.
Environmental Stress: Fluctuations in temperature, malnutrition, or insufficient space can prolong the gestation period.
Litter Size: A larger litter may shorten the delivery time, but this needs to be judged based on the mother’s health condition.
III. Delivery Signs and Precautions
Pre-Delivery Signs
The mother hamster will frequently arrange nesting materials, have a noticeably swollen abdomen, and move more slowly.
Post-Delivery Care
Avoid disturbing the mother hamster. Provide high-protein foods (such as boiled eggs, mealworms) to support her recovery.
IV. Handling Abnormal Situations
If the gestation period exceeds 22 days without delivery, check for potential causes such as malnutrition or abnormal fetal development. Consult a veterinarian if necessary.