Marsupials give birth to immature live young that continue to develop within the mother's pouch?

Marsupials do give birth to immature live young that continue to develop within the mother's pouch. After it climbs up the mother's belly and gets in the pouch it grabs on to one of the teats. After several weeks, the young marsupial starts coming out more and more. It leaves the pouch when it is about 7 to 10 months old.