胎たい生せい

noun

viviparity

Biological term for the reproductive mode in which embryos develop inside the mother's body and are born live.

• 哺ほ乳にゅう類るいは一いっ般ぱんに胎たい生せいである。

  Mammals are generally viviparous.

noun which may take the genitive case particle 'no'

viviparous; live-bearing

Adjectival use, often in compounds like 胎生動物 (viviparous animal).

• 胎たい生せいの魚さかなも存そん在ざいする。

  There are also viviparous fish.