Mammals that give birth to live young that have developed inside the body of the parent are classified as viviparous mammals. This group primarily includes eutherians (placental mammals), which have a complex placenta that supports the developing fetus throughout gestation. Examples of viviparous mammals include humans, dogs, and elephants.In contrast, marsupials also give birth to live young but typically deliver them at a very early stage of development, allowing them to continue developing in a pouch.HOPE IT HELPS