Viviparous animals are those that give birth to live young instead of laying eggs. This characteristic is commonly observed among mammals. Here are some examples of viviparous animals:

1. Humans:
- Humans are viviparous mammals.
- The female carries the developing fetus inside her womb until it is fully developed.
- The fetus receives nutrients and oxygen through the placenta and umbilical cord.
- After a gestation period of around 9 months, the baby is born alive.

2. Dogs:
- Dogs are another example of viviparous animals.
- Female dogs undergo a gestation period of about 63 days.
- The puppies develop inside the mother's uterus, receiving nutrients and oxygen through the placenta.
- When the puppies are fully developed, they are born alive.

3. Cats:
- Cats are viviparous mammals as well.
- Female cats have a gestation period of approximately 63 to 66 days.
- The kittens develop inside the mother's uterus and are nourished through the placenta.
- When the kittens are ready, the mother gives birth to them.

4. Dolphins:
- Dolphins are marine mammals that exhibit viviparity.
- Female dolphins carry their developing offspring inside their bodies for a period of about 10 to 12 months.
- The fetus receives nourishment from the mother through the placenta.
- When the time comes, the dolphin gives birth to a live calf.

5. Kangaroos:
- Kangaroos are unique viviparous animals.
- Female kangaroos have a reproductive process called embryonic diapause.
- After mating, the embryo enters a state of suspended development until the conditions are favorable for its growth.
- When the joey is born, it is underdeveloped and crawls into the mother's pouch, where it continues to develop.

6. Elephants:
- Elephants are viviparous mammals with a long gestation period.
- The female carries the developing fetus for approximately 22 months.
- The mother provides nourishment to the fetus through the placenta.
- When the baby elephant is fully developed, it is born alive.

Viviparity is a fascinating reproductive strategy observed in various animal species. It ensures the survival and well-being of the offspring by providing them with a controlled and nurturing environment within the mother's body until they are ready to face the outside world.

Cat dogs and rabbits ......