This is a picture of a pregnant syrian
Hamster pregnancies typically last from 17 days (for Syrian hamsters) to 18 to 22 days (in the case of dwarf hamsters). It is not always easy to detect pregnancy in a hamster, but changes in behavior and appearance can give clues as to the hamster's state. If a female hamster begins gathering bedding into a "nest," eating and drinking more or if she gains weight, she is probably pregnant. It is essential to give a female hamster plenty of space during this time period, to prevent her from cannibalizing her young.