Development of the embryo inside mother / From Wikipedia, the free encyclopedia

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Among animals, viviparity is development of the embryo inside the body of the mother. This is opposed to oviparity which is a reproductive mode in which females lay developing eggs that complete their development and hatch externally from the mother.[1]

An aphid giving viviparous birth, an unusual mode of reproduction among insects

The term 'viviparity' and its adjective form 'viviparous' derive from the Latin vivus meaning "living" and pario meaning "give birth to".[2]