viviparous

vivipaarinen, eläviä poikasia synnyttävä puhekieltä Being born alive, as are most mammals, some reptiles, and a few fish (as opposed to being laid as an egg and subsequently hatching, as do most birds and many other species).
puhekieltä Arising from an embryo that develops from the outset (rather than from a true seed that then germinates).