Assisted Reproductive Technology (or Technique), commonly called ART, refers to any infertility treatment that uses advanced technology to combine sperm and eggs outside the body in a laboratory. Most couples go through extensive infertility evaluation before considering ART. Some infertile couples will choose to use lower-technology treatments, such as intrauterine insemination (IUI), before turning to ART. Others find that their chances at getting pregnant are optimal with ART. It's estimated that about one-third of infertile couples in the United States are good candidates for infertility treatment using ART.