First of all, the anus of male hamsters is far away from the genitals, while the anus of female hamsters is very close to the genitals, almost touching each other. Secondly. When male hamsters are about one month old, there will be an obvious scent gland in the middle of the abdomen, while female hamsters have no scent glands, and there are a row of nipples on both sides of the abdomen, also called double-breasted.
Finally, an adult male hamster will have two very large balls, which look very plump, while the female hamster's butt is relatively pointed. Usually triangular in shape.
