Zoo performs first reverse vasectomy on horse

(AP) -- Scientists at the Smithsonian Institution's National Zoo have revealed they reversed a vasectomy on an endangered horse to allow it to reproduce naturally - the first-known operation of its kind on an endangered species.

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<p><a href="http://www.physorg.com/news132903615.html">Zoo performs first reverse vasectomy on horse</a></p> <p>(AP) -- Scientists at the Smithsonian Institution's National Zoo have revealed they reversed a vasectomy on an endangered horse to allow it to reproduce naturally - the first-known operation of its kind on an endangered species.</p>