Medycyna Wet. 67 (2), 115-119, 2011
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| Nowak T. A., Jaśkowski J. M., Szczepankiewicz D., Olechnowicz J. |
| Quality and number of cumulus-oocyte complexes (COC) and concentrations of leptin and ghrelin in blood and follicular fluid depending on the body condition of cows |
| The aim of our study was to investigate the effect of body condition on the number of ovarian follicles, the number and quality of COC-complexes and/or concentration of leptin (LEP), total and active ghrelin (TGHR and AGHR) in blood plasma and follicular fluids. Before slaughter all cows were divided into five classes according to their body condition scores (BCS). Body condition had no significant influence on the number of follicles and aspirated oocytes. The mean number of oocytes of a very good quality (Grade 1 and Grade 2) was 0.79 and 1.14 in cows with BCS 2.50 and 2.51-3.0, and was lower than 2.69, 2.66 and 2.0, respectively, aspirated from follicles in cows from group 3.01-3.5, 3.51-4.0 and > 4.0. Body condition influenced the number of COCs of a very good quality (Grade 1, P < 0.05). There was no relation between body condition and the number of oocytes grades 2 and 4. We found an interrelation between blood leptin concentration and its concentration in the follicular fluid (P < 0.01). No significant relationship exists between the BCS of cows and concentrations of leptin and active ghrelin in blood plasma and the follicular fluid. |
| Keywords: cows, BCS, oocyte quality, follicular fluid, leptin, ghrelin |