Results 81 to 90 of about 199 (135)
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Attempts to induce bovine freemartinism experimentally
Reproduction, 1965Summary. The effects of androgens on differentiation of embryonic ovaries during early pregnancy in the cow have been studied. Androgens injected between the allantochorion and the endometrium of cows (37 to 80 days pregnant) did not transform the gonads of female foetuses in the male direction but were capable of masculinizing the ...
M R, Jainudeen, E S, Hafez
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Probable Freemartinism in a Goat
Journal of the American Veterinary Medical Association, 1980R H Bondurant
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Veterinary Record, 1978
A case of intersexuality in a Dorset horn ewe is described. Although possessing female external genitalia this animal had a male internal reproductive tract with inguinal testes, epididymes, vasa deferentia and seminal vesicles. No traces of cervix or uterus were present and the vagina was represented in its caudal part only.
P R, Wilkes, I B, Munro, W V, Wijeratne
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A case of intersexuality in a Dorset horn ewe is described. Although possessing female external genitalia this animal had a male internal reproductive tract with inguinal testes, epididymes, vasa deferentia and seminal vesicles. No traces of cervix or uterus were present and the vagina was represented in its caudal part only.
P R, Wilkes, I B, Munro, W V, Wijeratne
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Sex Panic and the Productive Infertility of the Freemartin
Technology and Culture, 2023abstract: Freemartinism is a biological phenomenon in genetically female cows born from a dizygotic twin pregnancy. Placental connections—blood and hormones between the freemartin and their male twin—generate an intersex cow unable to conceive. In this study, the freemartin emerges in a constant state of flux: between waste and use; becoming a ...
Beech, L., Novick, T.
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Nature, 1958
WITH cattle twins of opposite sex the female is in almost all cases infertile and shows varying degrees of masculinity, both in behaviour and in the morphology of the reproductive tract. Such females are known as freemartins. Swett et al. 1 consider that the freemartin condition is due to irreversible modification of the female by masculinizing ...
N. W. MOORE, L. E. A. ROWSON
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WITH cattle twins of opposite sex the female is in almost all cases infertile and shows varying degrees of masculinity, both in behaviour and in the morphology of the reproductive tract. Such females are known as freemartins. Swett et al. 1 consider that the freemartin condition is due to irreversible modification of the female by masculinizing ...
N. W. MOORE, L. E. A. ROWSON
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Evidence of the Freemartin Condition in the Goat
Cytogenetic and Genome Research, 1967Cytogenetic examination of a genetically polled intersex goat revealed a state of apparent XX/XY haemopoietic chimaerism. As this goat was born with a male litter mate, it is considered to be a freemartin. The possibility that genetic goat intersexes are also freemartins is suggested.
P L, Ilbery, D, Williams
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The freemartin syndrome: an update
Animal Reproduction Science, 2005The freemartin condition represents the most frequent form of intersexuality found in cattle, and occasionally other species. This review considers the current state of knowledge of freemartin biology, incidence, experimental models, diagnosis, uses for freemartins in cattle herds, occurrence in non-bovine species, effects on the male, and highlights ...
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