Reproductive responses of dairy cows with ovarian cysts to simultaneous human chorionic gonadotropin or gonadotropin-releasing hormone and cloprostenol compared to gonadotropin-releasing hormone alone treatment

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Reproductive responses of dairy cows with ovarian cysts to simultaneous human chorionic gonadotropin or gonadotropin-releasing hormone and cloprostenol compared to gonadotropin-releasing hormone alone treatment.

AIM Bovine ovarian cysts are a common cause of economic loss in modern dairy herds. The objective of the present study was to evaluate the reproductive responses to three protocols using hCG, GnRH and cloprostenol when the definite diagnosis of the type of ovarian cyst is/is not possible in dairy cows. MATERIALS AND METHODS A total of 144 lactating dairy cows with ovarian cysts were divided i...

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Pulsatile administration of gonadotropin-releasing hormone agonist to gilts actively immunized against gonadotropin-releasing hormone.

Sexually mature gilts (n = 20) were actively immunized against GnRH. Primary and booster immunizations of GnRH conjugated to bovine serum albumin induced production of antibodies in all gilts. Nineteen of the gilts became acyclic with suppressed concentrations of gonadotropins and estradiol. Intravenous challenges with 100 micrograms GnRH and 5 micrograms D-(Ala6, des-Gly-NH2(10)) ethylamide Gn...

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Pituitary and ovarian responses to gonadotropin releasing hormone, calf removal and progestogen in anestrous beef cows.

Effects of Syncro-Mate B (SMB) and(or) short-term calf removal (CR) on pituitary and ovarian responses after gonadotropin releasing hormone (GnRH) were studied in two experiments. In Exp. 1, 24 thin, 2-yr-old, anestrous, Brahman crossbred cows were allotted randomly to a 2 x 2 factorial design involving 27-h CR and SMB. All cows were injected (iv) with 150 /ag GnRH at 24 h after removal of impl...

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Lack of release of human chorionic gonadotropin by gonadotropin-releasing hormone.

The effects of either single injection or continuous infusion of synthetic Gn-RH on plasma hCG levels were studied in 5 pregnant women (14-38 week gestation). No definite increase of hCG level was seen in all the cases studied. In view of large dosages of Gn-RH used in this study in comparison with its minimum effective dose for the pituitary gonadotropin release, Gn-RH seems unlikely to play a...

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O-27: Treatment of Ovarian HyperstimulationSyndrome Using Gonadotropin Releasing HormoneAntagonist

Background: Ovarian hyperstimulation syndrome is the most serious complication of ovarian stimulation. This novel study aimed to describe an outpatient treatment protocol for ovarian hyperstimulation syndrome (OHSS) that results in rapid normalization of symptoms with minimal side effects. Materials and Methods: A prospective study was undertaken at Infertility department of Shariati Hospital a...

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ژورنال

عنوان ژورنال: Veterinary World

سال: 2015

ISSN: 0972-8988,2231-0916

DOI: 10.14202/vetworld.2015.640-644