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1 July 1992 Freemartinism in a Captive Herd of Rocky Mountain Bighorn Sheep (Ovis canadensis)
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Abstract

Freemartinism in two animals from a captive herd of Rocky Mountain bighorn sheep (Ovis canadensis) at the Denver Zoological Gardens (Denver, Colorado, USA) is described. A young ewe had female external genitalia, a masculine appearance, and demonstrated male behavior as she matured. Another ewe with female external genitalia died as a yearling. Necropsy revealed a non-patent vagina and internal male genitalia. Both females were chimeric with karyotypes containing XX and XY sex chromosomes.

David E. Kenny, Richard C. Cambre, Michelle W. Frahm, and Thomas D. Bunch "Freemartinism in a Captive Herd of Rocky Mountain Bighorn Sheep (Ovis canadensis)," Journal of Wildlife Diseases 28(3), 494-498, (1 July 1992). https://doi.org/10.7589/0090-3558-28.3.494
Received: 21 May 1991; Published: 1 July 1992
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