[Gonadotropin release and course of diseases after administration of a GnRH-analog in cattle with follicular-thecal cysts].
Twenty-five heifers and cows with follicular cysts (high level of total oestrogens, low level of progesterone in plasma) were treated with 20 or 50 micrograms buserelin i.m. 5-84 weeks after parturition. Two hours after medication an increased LH release was observed in all animals. In contrast to LH, FSH concentration was not increased in all cows. Twelve days after treatment a high progesterone concentration in plasma could be determined in 17 of 25 treated animals. Twenty cows showed oestrous symptoms 23.5 +/- 9.6 days after medication. The oestrous cycle was prolonged in 10 cows. Nineteen cows were inseminated and 14 cows became pregnant after 1-4 (phi 1.7 +/- 0.9) inseminations (73.6% of all inseminated cows and 56% of all treated cows). The differences in conception rate and in services per conception after treatment with 20 or 50 micrograms buserelin in favour of the higher dosage cannot be attributed to the medication.
Grunert
E
E
Klinik für Geburtshilfe und Gynäkologie des Rindes, Tierärztlichen Hochschule Hannover.
Völker
R
R
Schams
D
D
Schallenberger
E
E
D000818:Animals; D002064:Buserelin / Q000494:pharmacology / Q000627:therapeutic use*; D002417:Cattle; D002418:Cattle Diseases / Q000188:drug therapy*; D004971:Estrus / Q000187:drug effects; D005260:Female; D005306:Fertilization; D005640:Follicle Stimulating Hormone / Q000378:metabolism*; D005497:Follicular Cyst / Q000188:drug therapy / Q000662:veterinary*; D007315:Insemination, Artificial / Q000662:veterinary; D007986:Luteinizing Hormone / Q000378:metabolism*; D011374:Progesterone / Q000097:blood
D011374:Progesterone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D002064:Buserelin
Gonadotropin-Ausschüttung sowie Krankheitsverlauf nach Applikation eines GnRH-Analogs bei Rindern mit Follikel-Theka-Zysten.