• (n.) The quality or condition of being viviparous.
retention and growth of the fertilized egg within the maternal body until the young animal, as a larva or newborn, is capable of independent ... [12 related articles]
a form of reproduction where the young are nourished in the reproductive tract of the female (other then by a yolk sac) and expelled from the mother as free-swimming young. It is often used loosely to refer to any species that gives birth to live young (also see ovoviviparity). 
Viv`i·par'i·ty noun (Biol.) The quality or condition of being viviparous. H. Spencer. 
Type: Term Pronunciation: viv′i-pār′i-tē Definitions: 1. The quality or state of being viviparous, producing offspring that are living at the time of birth. Synonyms: zoogony
viviparity The condition of being viviparous or the ability to produce living young rather than producing young by laying an egg, or eggs, and then having it/them hatch.
giving birth to live young (not eggs).
Quality or state of being viviparous.