Viviparous mammals are a group of animals that give birth to live young instead of laying eggs. This reproductive method allows the developing offspring to receive nutrients and oxygen directly from the mother through a specialized organ called the placenta. Most mammals, including humans, dogs, and whales, are viviparous. In viviparous mammals, the young are born in a more advanced state compared to those of egg-laying species. This adaptation helps increase the chances of survival, as the young are often more developed and capable of independent life shortly after birth. Examples of viviparous mammals include primates, carnivores, and cetaceans.