Researchers in California are attempting to make an artificial testicle that will produce human sperm. Dr. Paul Turek, director of the Turek Clinic in San Francisco, which specializes in male infertility, said the goal is not to create a testicular implant for men, but a “sperm-making biological machine” that will help scientists learn more about just what causes male infertility…Approximately 15 percent of couples are infertile, and in about half of those cases, the man is the source of the infertility, according to the Mayo Clinic.

ABC News, by Carrie Gann, 1/19/2012

Tags: Mayoclinic.com