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 ?
However, if you end up with a male/female pair, and you're a glass-half-full sort of person, there are ways to tell if your female is a heifer or a freemartin.
Touching placentas will often form into one, ensuring a freemartin.
Due to freemartins, the practice of purchasing or retaining the female half of twins for breeding purposes should be avoided.