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Endokrine Veränderungen beim Rind nach GnRH-Applikation I. GnRH-stimulierte LH- und FSH-Sekretion in Abhängigkeit vom Zyklusstadium und bei Kühen mit Ovarzysten


Braun, U; Stock, A; Schams, D; Leidl, W (1988). Endokrine Veränderungen beim Rind nach GnRH-Applikation I. GnRH-stimulierte LH- und FSH-Sekretion in Abhängigkeit vom Zyklusstadium und bei Kühen mit Ovarzysten. Journal of Veterinary Medicine Series A, 35(1-10):129-137.

Abstract

Endocrine changes in cattle treated with GnRH I. GnRH-stimulated LH and FSH secretion in relation to stage of cycle and in cows with ovarian cysts. The aim of the present investigation was to determine whether there is a difference between LH and FSH secretion in cows with ovarian cyst disease and normal cows stimulated by GnRH. Seven cows were treated with 20 μg GnRH (Buserelin) once in oestrus and on days 3, 13 and 19 of the oestrous cycle. Eighteen cows with ovarian cysts were divided into 2 groups according to a plasma progesterone concentration of greater or lower than 1 ng/ml. These cows, also, were treated with 20 μg Buserelin. The basal LH concentrations in the cyclic cows and in the animals with ovarian cysts were identical. The basal FSH secretion of the cows with ovarian cysts was 25 % lower than in the cyclic animals. The LH secretion released by GnRH of the “cystic” cows was twice that of cows in oestrus and on day 3 of the oestrous cycle. The FSH secretion induced by GnRH in the “cystic” cows with progesterone concentrations below 1 ng/ml were 40 % lower than that of the animals of all other cyclic stages. These differences in the endocrine functions open new aspects for the clinical assessment of ovarian cysts in the cow

Abstract

Endocrine changes in cattle treated with GnRH I. GnRH-stimulated LH and FSH secretion in relation to stage of cycle and in cows with ovarian cysts. The aim of the present investigation was to determine whether there is a difference between LH and FSH secretion in cows with ovarian cyst disease and normal cows stimulated by GnRH. Seven cows were treated with 20 μg GnRH (Buserelin) once in oestrus and on days 3, 13 and 19 of the oestrous cycle. Eighteen cows with ovarian cysts were divided into 2 groups according to a plasma progesterone concentration of greater or lower than 1 ng/ml. These cows, also, were treated with 20 μg Buserelin. The basal LH concentrations in the cyclic cows and in the animals with ovarian cysts were identical. The basal FSH secretion of the cows with ovarian cysts was 25 % lower than in the cyclic animals. The LH secretion released by GnRH of the “cystic” cows was twice that of cows in oestrus and on day 3 of the oestrous cycle. The FSH secretion induced by GnRH in the “cystic” cows with progesterone concentrations below 1 ng/ml were 40 % lower than that of the animals of all other cyclic stages. These differences in the endocrine functions open new aspects for the clinical assessment of ovarian cysts in the cow

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Department of Farm Animals
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Language:English
Date:1988
Deposited On:23 Feb 2016 08:46
Last Modified:05 Apr 2016 20:09
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:0931-184X
Publisher DOI:https://doi.org/10.1111/j.1439-0442.1988.tb00015.x

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