freemartin

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freemartin

[′frē‚märt·ən]
(vertebrate zoology)
An intersexual, usually sterile female calf twinborn with a male.
References in periodicals archive ?
Hence, they could not be freemartins, yet they inherited Y chromosome material from somewhere, most likely from their fathers."
Freemartins often have a longer distance from the vulva to the anus, with the vulva being undersized or missing.
The Veterinary Diagnostic Laboratory at the University of Minnesota tests blood samples to determine if suspected freemartins are actually breeding heifers.
About 94 percent of female calves born twin to male calves are sterile and are called "freemartins." Outwardly female in appearance, the reproductive system is severely underdeveloped.
There was one case of freemartin. Freemartin heifers are caused by circulation of male twin's hormones through the developing female foetus (Roberts, loc cit.).
The freemartin, commonly seen in cattle, is an example of this condition.