Polar Bear Cubs Key Ring

Polar bear cubs are born November through January in a den. Mother and cubs emerge from their den in late March or April. During their first few weeks of life, polar bear cubs nurse most of the time and stay close to their mother to keep warm. Most adult females give birth once every three years. In some populations, birth occurs once every two years. The most frequent litter size is two, followed by litters of one. Litters of three are less common than twins or singles, and litters of four are rare.