| Autor: |
Hamidi, Ali, Mamoei, Morteza, Mirzadeh, Khalil, Tabatabaei, Saleh, Roshanfekr, Hedayat-allah |
| Předmět: |
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| Zdroj: |
Comparative Clinical Pathology; Oct2012, Vol. 21 Issue 5, p819-823, 5p |
| Abstrakt: |
The aim of this study was to evaluate the seasonal variations of growth hormone concentration in serum and its association with semen characteristics and testosterone level in Arabic rams. The study was carried out with six adult Arabic rams aged 2 to 3 years old. The experiments showed a seasonal variation in growth hormone level. The concentration of growth hormone in breeding season was significantly higher than that in the non-breeding season. In both breeding and non-breeding seasons, there was a positive correlation between serum growth hormone concentration and spermatozoa quality parameters include motility, concentration and viability as well as testosterone concentration. Controversy, a negative correlation was revealed between growth hormone value and abnormal sperm percent in both seasons. Thus, seasonal variation of growth hormone concentration was accompanied with marked alterations in semen characteristics and testosterone level. It can be concluded that one reason for low concentration of testosterone and poor semen quality in the non-breeding season can likely be due to low concentration of blood growth hormone. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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