Birthing chamber
A birthing chamber was a device used by the Dominion to breed the Jem'Hadar. Within three days of emerging, they were fit for combat. 

Upon hearing this along with their lack of need for food or sleep from Virak'kara in 2372, Jadzia Dax felt she understood why Jem'Hadar were so hostile. ()

See also 
Birthing tank
Breeding ground
Ex utero
Growth tank
Hatchery
Incubation pod
Incubator
Maturation chamber

de:Geburtskammer
Medical equipment
Sex and reproduction