ovoviviparity

Definition

Noun (Biology): A mode of reproduction in which embryos develop inside eggs that remain within the mother's body until they are ready to hatch. The offspring receive no direct nourishment from the mother beyond the yolk of the egg, unlike in viviparity (where the mother provides nutrients). The eggs are retained internally, and the young are born live.

Usage Examples
  • (The young develop in eggs kept inside the mother and emerge live.)
  • (It involves internal egg retention without maternal nutrient supply.)
  • (No direct nourishment from the mother occurs.)
Advanced Usage

  • "Facultative ovoviviparity": A form where egg retention and hatching can vary based on environmental conditions.

    • Some lizard species display facultative ovoviviparity, retaining eggs longer in colder climates. (The timing of hatching depends on external factors.)

  • "Obligate ovoviviparity": A fixed reproductive mode where eggs are always retained until hatching.

    • Many elasmobranchs, like certain rays, show obligate ovoviviparity. (Internal egg retention is mandatory for successful reproduction.)
Variants and Related Words

  • Ovoviviparous (adj): Describing an organism that reproduces by ovoviviparity.

    • The ovoviviparous guppy gives birth to live young after internal egg development. (The species uses this reproductive method.)

  • Oviparity (n): Reproduction by laying eggs that develop outside the mother's body.

    • Birds exhibit oviparity, laying eggs that hatch externally. (Contrast with ovoviviparity.)

  • Viviparity (n): Reproduction where the embryo develops inside the mother, receiving nutrients directly.

    • Mammals typically show viviparity, with the placenta feeding the fetus. (Opposite of ovoviviparity.)
Synonyms

  • Egg retention: A general term for keeping eggs inside the body during development.

    • Egg retention is a key feature of ovoviviparity. (The eggs are not laid externally.)

  • Internal incubation: The process of eggs developing inside the parent.

    • Internal incubation characterizes ovoviviparity in many fish. (The eggs are incubated within the mother.)
Related Idioms

  • "Born from an egg within": A descriptive phrase for ovoviviparity.

    • The snake's young are born from an egg within, a classic case of ovoviviparity. (Live birth from internally hatched eggs.)

  • "Live-bearing egg layer": A colloquial term for an ovoviviparous organism.

    • The constrictor is a live-bearing egg layer, thanks to ovoviviparity. (It produces live young from retained eggs.)