Here's how it works:
* Pregnancy: A female polar bear will be pregnant for about two months.
* Denning: She digs a snow den where she gives birth, usually in the winter.
* Birth: She typically gives birth to one to three cubs.
* Nursing: The cubs are born blind and helpless, and they rely entirely on their mother for milk and warmth. They stay in the den with their mother for about two years.
So, while a polar bear starts life as a tiny, helpless cub, it comes from its mother, not an egg!