Nevertheless it produces litters of variable size (four at the largest) each year.

Female canyon mice can produce multiple litters of between two and five young every year.

They can produce large litters of 20 or more young, although the average litter size is between eight and ten pups.

Captive specimens have produced litters of two to seven young.

There is usually a 2-3 year interval period before females produce subsequent litters.

Where climate and food supply permit, females can produce several litters a year.

Pigs breed more quickly than sheep, and produce larger litters.

Stray dogs often produce litters in which every puppy has a different father.

From my calculations, this species is incapable of producing large litters.

Females produce litters of one to seven young every year.