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