sentence: Pups are born with their eyes open and covered in fur.
sentences_before: Gestation length is between 38 and 42 days. Litters are normally 2 to 3 pups, but females may have up to 6 pups in a single litter. Other females within the social group may help in the birthing process and look after the pups.
sentences_after: They will begin to leave the nesting area at about 3 days of age. Pups are weaned around 5 to 6 weeks and reach sexual maturity at about 6 to 9 weeks. A female can become pregnant at any time in the year and may have up to 12 litters in a year.
concept_name: pup
headings: Spiny mouse Spiny Mice as Exotic Pets Reproduction
categories: Rodents