Gonadotropin releasing hormone (GnRH) affects precopulatory behavior in testosterone-treated geldings
| Autor: | Sue M. McDonnell, M.C. Garcia, Robert M. Kenney, Nancy Kate Diehl |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Testosterone propionate
Male endocrine system medicine.medical_specialty Flehmen response Experimental and Cognitive Psychology Gonadotropin-releasing hormone Behavioral Neuroscience chemistry.chemical_compound Sexual Behavior Animal biology.animal Internal medicine Copulation medicine Animals Testosterone Horses Estrous cycle biology Pony Penile Erection Horse Endocrinology chemistry Sexual behavior Orchiectomy Pituitary Hormone-Releasing Hormones hormones hormone substitutes and hormone antagonists |
| Zdroj: | Physiologybehavior. 45(1) |
| ISSN: | 0031-9384 |
| Popis: | Twelve pony geldings with (n = 6) and without (n = 6) testosterone replacement (200 micrograms/kg testosterone propionate in oil, SC every 48 hours) received either gonadotropin releasing hormone (GnRH; 25 micrograms SC every 3 hours) or control treatment. Sexual behavior was recorded during 4-minute exposure to an estrous mare, 3 times weekly for 2 weeks before treatment, 3 weeks during treatment, and 3 weeks after treatment had been discontinued. The group receiving testosterone and GnRH (n = 3) exhibited significantly greater flehmen response frequency and attention duration and significantly lower vocalization frequency and erection duration than the group receiving only testosterone (n = 3). GnRH had no apparent effect on sexual behavior in geldings without testosterone replacement (n = 3). These results support an hypothesis of testosterone-dependent, CNS-mediated effects of GnRH on precopulatory behavior in the stallion. |
| Databáze: | OpenAIRE |
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