A freemartin or free-martin (sometimes martin heifer) is an infertile female mammal which has masculinized behavior and non-functioning ovaries. Genetically the animal is chimeric: karyotyping of a sample of cells shows XX/XY chromosomes. [The animal originates as a female (XX), but acquires the male (XY) component in utero by exchange of some cel...
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http://en.wikipedia.org/wiki/Freemartin
(from the article `Lillie, Frank Rattray`) Lillie also demonstrated that bovine `freemartinism` is a classic example of hormonal intersexuality in which a male fetus influences the development ...
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http://www.britannica.com/eb/a-z/f/60
Female born twin to a bull calf (approximately 9 out of10 will be infertile).
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http://www.cattlepages.com/dictionary/
Female born twin to a bull calf (approximately 9 out of 10 freemartins will not conceive).
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http://www.encyclo.co.uk/local/20020
<veterinary, zoology> A condition occurring in dizygotic twins of different sexes in cattle, where an imperfect masculinised sterile female twin calf is born with a male. ... This results from twin foetuses of opposite sexes in which the chorionic blood vessels become fused at an early stage of embryonic development, with the result that the ...
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http://www.encyclo.co.uk/local/20973
a sterile heifer, born as a twin with a bull calf. The twin brother's hormones affect the development of the reproductive tract.
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http://www.fairvuefarms.com/terms.htm
A heifer calf born with a bull calf. Freemartins are sterile and occur 9 out of 10 twin births.
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https://www.encyclo.co.uk/local/22166
a female calf that is born as a twin with a male and is sterile as a result of exposure to masculinizing hormones produced by the male.
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https://www.infoplease.com/dictionary/freemartin
No exact match found.
