sentence: Babies are born about five weeks after mating.
sentences_before: Because they are marsupials, the female carries its young in special pouch.
sentences_after: The tiny baby which is only about 15 millimetres long, and weighs less than one gram, crawls up into the pouch. Inside the pouch there are four nipples. The baby kangaroo, called a joey, will only use one of the nipples. It lives in the pouch for about eight months. It still drinks milk from its mother until about 18 months of age.
concept_name: baby
headings: Eastern Grey Kangaroo Description
categories: Macropods Marsupials of Australia