It’s a Polar Bear fact!
Polar Bears possess one of the “lowest reproduction rates of any mammal.”
“The young are born from November through January while the mothers are hibernating. Cubs will remain with their mothers for a little over 2 years. Female polar bears can produce five litters in their lifetime, which is one of the lowest reproductive rates of any mammal.” source: www.defenders.org/polar-bear/basic-facts
Polar bear mother & cub, photographed Churchill, Manitoba.