The Platypus and the Echidna are the only mammals that are Oviparous.
The platypus is oviparous. Monkeys are not oviparous. Neither are opossums, which give birth to embryonic young. Bats and armadillos do not lay eggs, so they aren't oviparous either.
The platypus IS oviparous. Along with the echidna, it is an egg-laying mammal. Any egg-laying animal is oviparous rather than viviparous, which means giving birth to young outside of the body.
Viviparous
VIVIPAROUS
Viviparous
No placenta in viviparous and oviparous but there is placenta in ovoviviparity
oviparous
oviparous
Octopus is a oviparous
Cockroach are three types in reproduction - oviparous, viviparous and ovoviviparous. Most cockroach are oviparous.
viviparous
Pandas are viviparous.