A new born bear is called a cub...
Any newborn bear, polar or otherwise, is called a cub.
9.3 in long
A newborn sheep is called a 'lamb'.
A newborn elephant is called a calf.
probably 20 kilograms maybe
two pounds
A newborn panda is much smaller than other bear species. It typically weighs around 3 to 5 ounces, while newborns of other bear species can weigh up to 20 ounces.
for about 2 months
Newborn deers are called "fawns".
About 3-10 pounds.
There is not a general term for newborn animals. Different animals are called different things. For example, newborn chickens are called chicks.
Newborn Bush Babies are called bushels in most countries except for Africa, where they are called Gala.