Lots More Information

Related HowStuffWorks Articles

• How Childbirth Works
• How Pregnancy Tests Work
• How Pregnancy Works
• How Prenatal Testing Works
• Rabbits and Hares

More Great Links

• AnimalPlanet.com
• How to Care for Rabbits
• A Thin Blue Line: The History of the Pregnancy Test Kit
• National Women's Health Information Center

Sources

• Armstrong, J.A. "Urinalysis in Western culture: A brief history." International Society of Nephrology. 2007.
  http://camprogram.georgetown.edu/JArmstrong.pdf
• Conis, Elena. "Barley, beer and a thin blue line." Los Angeles Times. March 19, 2007.
  http://articles.latimes.com/2007/mar/19/health/he-esoterica19
• de Boer, Bonita. "HIV Drugs, Vaccines and Animal Testing." March 3, 2008. (June 27, 2008)
  http://www.avert.org/hiv-animal-testing.htm
• Engber, Daniel. "The Amphibian Pregnancy Test." Slate. Jan. 12, 2006. (June 27, 2008)
  http://www.slate.com/id/2134212/
• Howe, Marvine. "Dr. Maurice Friedman, 87, Dies." New York Times. March 10, 1991.
  http://query.nytimes.com/gst/fullpage.html?res=9D0CE1DF103EF933A2575
  0C0A967958260
• Nissl, Jan. "Human Chorionic Gonadotropin (hCG)." WebMD. May 29, 2006. (June 27, 2008)
  http://www.webmd.com/baby/human-chorionic-gonadotropin-hcg
• "Hormone." Britannica Online Encyclopedia. 2008. (June 27, 2008)
  http://www.britannica.com/EBchecked/topic/271826/hormone
• "Human Chorionic Gonadotropin (hCG)." WebMD. May 29, 2006. (July 1, 2008)
  http://www.webmd.com/baby/human-chorionic-gonadotropin-hcg
• "The Rabbit Test." Snopes.com. July 22, 2007. (June 27, 2008)
  http://www.snopes.com/pregnant/rabbit.asp
• "A Timeline of Pregnancy Testing." A Thin Blue Line: The History of the Pregnancy Test Kit. (June 27, 2008)
  http://history.nih.gov/exhibits/thinblueline/timeline.html