Permanent infertility in ewes exposed to plant oestrogens.
Aust Vet J
; 67(6): 197-201, 1990 Jun.
Article
en En
| MEDLINE
| ID: mdl-2222361
In Australia, more than 1 million ewes have permanently damaged reproductive tracts because they have been grazed on oestrogenic pasture. These effects occur in the absence of classical clinical "clover disease". The lesions result from an "organisational" action of oestrogen, causing a mild sexual transdifferentiation to occur in ewes during adult life, with the main lesion being found in the cervix. Diagnosis of the problem depends primarily on detection of the pathological changes, rather than history or clinical signs. On average, affected flocks have around a 10% increase in non-pregnant ewes, but most farmers can achieve an acceptable lambing rate by increasing their management and feed inputs to produce more twin lambs. Agronomic approaches have been used in the past to combat "clover disease", but further progress with the present problem may depend on the development of animal-based solutions.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Intoxicación por Plantas
/
Enfermedades de las Ovejas
/
Estrógenos
/
Infertilidad Femenina
Tipo de estudio:
Etiology_studies
Límite:
Animals
País/Región como asunto:
Oceania
Idioma:
En
Revista:
Aust Vet J
Año:
1990
Tipo del documento:
Article
Pais de publicación:
Reino Unido