Fetuses aren't grown nor stay in the dam's stomach. They stay and grow in the womb or uterus, not the stomach. How long these cubs stay in their mother depends on the species: it can range from 5 to 8 months long.
Bears are not marsupials. The female does not have a pouch in which to rear the young.
Koalas live in their mother's pouch, but they are not bears, despite a common misconception.
Kangaroos only live in Australia. They are native to that country. The bear live young, but the mother raises her young in her pouch.
Marsupials are a classification of mammals. They bear live young which crawl into the mother's pouch, latch onto a teat, and stay there for several months whilst they continue their development.
A kangaroo joey stays in its mother's pouch for up to 235 days, which is around eight months.
A pademelon joey stays in its mother's pouch for around six months. After it ventures out, it still stays near its mother for several more months until it learns to live independently.
All marsupials have a pouch. All monotremes are egg laying mammals. Placental mammals give birth to live young, but do not have a pouch. Bears do not have a pouch, and they give birth to live young rather than laying eggs, so they are placental mammals.
No. Kangaroo joeys only live in the mother's pouch for up to eight months, and will continue to suckle from the mother for up to one year.
When first born, kangaroos are underdeveloped and about the size of a jellybean. They crawl up the mother's fur and crawl into her pouch. They continue to feed and develop in the pouch until about 6 to 10 months old.
Young pandas live with their mothers until they are 18 months to two years old.
Baby thylacines stayed in their mother's pouch for about three months before leaving. They would then stay in the den while the mother hunted for several more months.
After young marsupials, known as joeys, are born, they live in their mother's pouch for between several weeks and several months, depending on the species.
1 to 3 months1 to 3 months
Only the koala joey lives in a pouch. Koalas have a pouch for the development of their joey. Koalas joeys are born very undeveloped, and they need to complete their development in the mother koala's pouch, where they can stay attached to a teat for all their nutritional needs, and where they are protected. The koala baby feeds only on mothers' milk for 6-7 months. To make the transition from mothers' milk to eucalyptus leaves, at about 6-7 months the joey begins to feed on "pap", which is actually a special form of the mother's droppings through which she can pass onto her joey the micro organisms which allow for digestion of eucalyptus leaves. No other animal lives solely on gum leaves, and special proteins are needed to digest them. One of the reasons the koala has a backward-opening pouch is so that the joey can stick its head out and feed on this pap which comes from the mother's own digestive system. When the joey grows too large to fit in its mother's pouch, by about the age of ten months, it still feeds a bit on mother's milk, lying on her stomach to feed, and spending the rest of its time firmly attached to her back. It only leaves "home" when the next breeding season starts.