In order to save the baby's life Dr. Bashir transferred the fetus to Kira's body. Once transferred it was necessary for Kira to carry the baby to term. (DS9: "Body Parts")
According to the Star Trek: Star Charts (pg. 74), the Torad system was located in non-aligned space, in the Gamma Quadrant. This system was a single star system. Primary was a Class K star with a magnitude of +3, which was ten times the brightness of Sol. This system was a destination on the Gamma Quadrant Bio-Survey (2369-75).