Source:http://linkedlifedata.com/resource/umls/id/C0024852
CSP: mammals with maternal pouch (marsupium) containing nipples; epipubic bones, double uterum and vagina; embryo leaves uterus and develops in marsupium.,MSH: An infraclass of MAMMALS, also called Metatheria, where the young are born at an early stage of development and continue to develop in a pouch (marsupium). In contrast to Eutheria (placentals), marsupials have an incomplete PLACENTA.