Vectis Hamstery and Exotics

Exhibitor and Breeder of Chinese Hamsters and Syrian Hamsters

Sexing Chinese Hamsters

It is important to know whether your hamster is male or female to prevent unwanted litters if kept in pairs (remember that Syrians must live alone). Different health problems can affect males and females, for example pyometra in females.

Chinese hamsters are one of the most easy species of hamster to sex when adult, although it isn't as obvious when they are very young. A hamster, however, should be at least five weeks old when rehomed and by then the differences are clear.

These photos are of five week old normal Chinese hamsters:




Males develop a prominent scrotum from 5 weeks old. The openings of the male are therefore further apart than on a female.

Normal male: five weeks old

Normal male: adult

Dom spot male: three weeks old

Dom spot male: five weeks old

Dom spot male: adult

Males with Undescended Testicles

I have had one male with undescended testicles until the age of 8 months. Despite having a smooth contour when seen from above, he had wide spaced openings with fur in between which showed he was male.

The photos below were taken when he was 6 months old. He subsequently became very obviously male - he's in the right-hand picture above at 1 year old!


Females have a smoother contour to their rear end than males. They also have much narrower spacing between their opening, and lines of nipples running up their abdomens. I have found nipple lines more easily seen on dominant spots than normals.

Note the close spacing of openings with no fur in between. Nipple lines can be seen on the dominant spot hamster on the right. Both are adults and have never had pups. Nipples are often more prominent in pregnant and nursing hamsters.