Females mate at about 3 years of age. During time of mating, the sun bear will show behaviour like hugging, mock fighting and head bobbing with its mate. Litters consist of one or two cubs weighing about 10 oz each. Cubs are born blind and hairless. They suckle for about 18 months. After one to three months, the young can run, play and forage near their mother. They reach sexual maturity after 3–4 years, and may live up to 30 years in captivity.
