Animals

Difference between oviparous animals and viviparous animals

Main difference

There are a wide variety of animals in this world. Regarding the way of producing offspring, they are classified into oviparous animals and viviparous animals. Oviparous animals are those animals that produce their offspring by laying eggs. They reproduce by laying eggs and their egg contains an embryo. Development from the embryo to a full brood takes place within the egg. The egg is protected by a shell or hard cover. Common examples of oviparous animals are amphibians, reptiles, and birds, etc. Viviparous animals are those animals that produce their offspring by giving birth to a young, do not lay an egg, they reproduce by giving light directly to a young. The young develop inside the body of the mother and are nourished by the body of the mother, and once fully developed, the little ones are born or are expelled from the mother’s body as a complete baby. The most common example of a viviparous animal is the human. So the main difference between oviparous animals and viviparous animals is that oviparous ones produce an egg and viviparous ones produce offspring.

Comparative chart

Oviparous animals Viviparous animals
Reproduction Oviparous animals lay eggs. Viviparous animals give birth to the body of offspring.
Zygote In oviparous animals, the zygote or embryo develops within the egg. In viviparous animals, it develops inside the mother’s body.
Survival Oviparous eggs are less likely to survive. Viviparous offspring have a better chance of survival.
Example Oviparous animals are birds, some reptiles, and amphibians. Viviparous animals are humans, lions, horses, dogs, elephants, etc.
What are oviparous animals?

Ovi means egg and parous means birth. Oviparous animals are the animals that produce their offspring by laying eggs. They reproduce by laying eggs. In oviparous animals, the female lays fertilized or unfertilized eggs. The female lays the eggs in an external environment in a safe place, and the development of the zygote or embryo takes place inside the egg. The egg is protected by a hard shell around it, but even so the chances of survival are lower since the egg is present in the external environment, any minor external trauma can lead to the death of the offspring. When the young has completed its development period, it hatches from the egg by breaking the eggshell. Examples of oviparous animals are all birds, some reptiles, etc.

What are viviparous animals?

Vivi means body and porous means birth. Viviparous animals are those animals that give birth to a baby or their offspring by producing their entire body. They reproduce by producing offspring directly without eggs. Born offspring have no shell to cover them. The development of the offspring takes place within the mother’s body and gets all its nutrition from the mother’s body. When the offspring are fully developed, they leave the body. Viviparous pups had a better chance of survival as they are present inside the mother’s body and protected from external dangers. An example of viviparous animals are humans, animals such as cats, dogs, lions, etc.

Oviparous versus viviparous animals

  • Oviparous animals lay eggs, while viviparous animals give birth to their young.
  • In oviparous animals, the zygote or embryo develops within the egg, while in viviparous animals, it develops within the mother’s body.
  • Oviparous eggs are less likely to survive, while viviparous offspring are more likely to survive.
  • Oviparous animals are birds, some reptiles and amphibians, on the other hand, viviparous animals are humans, lions, horses, dogs, elephants, etc.

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