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. 1994;35(2):173-83.
doi: 10.1186/BF03548345.

Effects of oestrogenic silage on some clinical and endocrinological parameters in ovariectomized heifers

A I Nwannenna  1 , A Madej, T J Lundh, G Fredriksson
Affiliations

Effects of oestrogenic silage on some clinical and endocrinological parameters in ovariectomized heifers

A I Nwannenna et al. Acta Vet Scand. 1994.

Abstract
in English, German

The influence of phytoestrogens was studied in 3 ovariectomized Swedish Friesian heifers fed 20 kg of 100% red clover silage per heifer/day for 14 days. Behaviour, reproductive organs and pituitary response to exogenous gonadotropin-releasing hormone (GnRH) injections were monitored. Clinical effects like oedema and mucous discharge in the vulva, presence of milky fluid in the mammae and increases in teat size and the cross-sectional distance of the uterus were observed in heifers fed red clover silage. Fluid accumulation in the uterus, visualized by means of ultrasonography, had still not disappeared 30 days after the red clover silage had been completely withdrawn. Red clover silage appeared to reduce the magnitude and duration of the pituitary response to GnRH injections.

Inverkan av vaxtostrogener studerades på 3 ovarie-ektomerade kvigor, svensk låglandsboskap (SLB), som vardera utfodrades med 20 kg 100 procentigt rodkloverensilage per dag i totalt 14 dagar. Forandring i beteende, reproduktionsorgan och hypofysens respons på exogent gondadotropinfrisattande hormon (GnRH) undersoktes. Kliniska effekter som odem och forandring av mucus i vulva, mjolkse-kretion samt okning i spenstorlek och uterusstorlek observerades under rodkloverensilageutfodring. Ackumulering av vatska i uterus påvisades med ultraljudsteknik. Denna vatskeansamling var bestående aven 30 dagar efter avslutad rodklover-utfodring Rodkloverensilage tycks reducera magnituden och varaktigheten på hypofys-responsen av GnRH.

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