Black-footed ferrets sired by males that died 8 years ago
A two-week-old black-footed ferret is pictured in its nesting box at the National Zoo's Conservation and Research Center in Front Royal, Va. on July 3, 2008. The kit was born on June 21 to a two-year-old mother and a father who had died in 2000. National Zoo reproductive scientists inseminated the female with frozen black-footed ferret semen stored in their genome resource bank -- a frozen repository of sperm and eggs of a variety of endangered species. Credit: Mehgan Murphy, Smithsonian’s National Zoo Two black-footed ferrets at the Smithsonian's National Zoo have each given birth to a kit that was sired by males who died in 1999 and 2000. These endangered ferrets—part of a multi-institutional breeding and reintroduction program—were artificially inseminated in May with frozen semen from the two deceased males, each giving birth to a kit on June 20 and 21 respectively. The sperm samples were collected and frozen in 1997 and 1998. Successful inseminations with frozen semen are extremely rare—until now only three black-footed ferret kits have been born from this method.