Mammals which nourish their young in utero by means of a complex placenta, and give birth to their young alive. They include PRIMATES; CARNIVORA, WHALES; RUMINANTS; BATS; and RODENTS.

Synonyms: Mammals, Placental, txid9347, txid9349, Mammal, Eutherian, Placental Mammal, Myrmecophagidae, Placental Mammals, Eutheria, Eutherian, Anteaters, Eutherian Mammals, Aardvarks, Mammals, Eutherian, Mammal, Placental, Eutherians, Aardvark, Eutherian Mammal