Are polar bears born little?

Yes, for such a large animal the cubs are born very little. After a gestation period of anywhere from 195 days to 265 days. This includes a period for delayed implantation. The female Polar Bear will snuggle into the winter den she has built. Which is about the size of a telephone booth, with a couple of narrow alcoves. But this small space can keep her and the cubs, about 40 degrees warmer than it is outside. She then gives birth to anywhere from 1 to 4 cubs. But, on average it is a pair. The birthing occurs between late November, and early January. The cubs are born blind, almost hairless, and weigh about 1.3 pounds, about the size of a small rat. They depend on her for everything. Her milk is 35 percent fat, and considered the richest of any of the other bear species. This will help the tiny cubs grow fast and strong. By the time April arrives they can weigh more than 20 pounds, and be ready for the den to be opened and the sun to shine in. It will take on average, about two years before the cubs are ready to live on their own. For more details see sites listed below.