Naked mole rat
Males and females are able to breed at one year of age. Gestation is about 70 days. A litter is usually from three to twelve pups, but may be as large as 28. The average litter size is 11. In the wild, naked mole-rats usually breed once a year, if the litter survives. In captivity, they breed all year long and can produce a litter every 80 days.  The young are born blind and weigh about 2 gm. The queen nurses them for the first month; after which the other members of the colony feed them feces until they are old enough to eat solid food.