Here's why:
* All mammals reproduce sexually: This means a male and female are required to contribute genetic material for a baby to be born.
* A mother provides essential nutrients and protection: The mother's body provides the developing fetus with all the food and shelter it needs during pregnancy.
So, the answer is that there is no animal born without a mother in the natural world.
There are some cases of animals being raised without a mother (like orphaned animals), but they still needed a mother to give them life in the first place.