The Narn (Second Human Empire name Hamo Sinn'ooi) are a humanoid species that have on two occasions been conquered by the Centauri. Due to the Narn hated the Centauri race, they betrayed the Interstellar Alliance and joined the Coalition of Independent States and formed the Narn Empire after a dispute. Though somewhat reptilian in appearance, the Narn actually have more in common with Earth marsupials and felines than reptiles. As with many species, Narn sexual reproduction is heterosexual and viviparous, beginning with a direct male-to-female mating in which the female carries the young until birth. After which they are transferred to the male's abdominal pouch where they are nurtured for the next three months, until they are strong enough to survive outside of their father's body. From this process comes the terms "pouchling" and "pouchbrother/sister" which can culturally be used as an insult when directed at an adult, insinuating that they are too weak and helpless to survive by themselves. Typically Narn may conceive two or three children in a single brood and have a relatively low infant mortality rate. Narns usually only take single partners with whom they mate for life, though this is purely cultural and not a biological necessity.