Ovarian morphology and estradiol-17beta concentrations in serum and follicular fluid of slaughtered zebu cattle in Ibadan, Nigeria
| Autor: | Maxwell N. Opara, Charles I. Okoli, Udo Herbert, Oyewole Adeyemo |
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| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Veterinarski arhiv Volume 76 Issue 5 |
| ISSN: | 1331-8055 0372-5480 |
| Popis: | Over a period of three months (January to March), ovarian morphology and estradiol-17β concentrations in serum and follicular fluid were studied in 110 Bunaji (Bos indicus) cows slaughtered at Bodija abattoir, Ibadan, Nigeria, in order to determine the reproductive state and history of such cattle. Macroscopic examination of the ovaries revealed that 70 (63.6%) of the cows were undergoing active oestrous cycle. Of these, 42 (60.0%) had large ovarian follicles of greater than 3 mm diameter, while 22 (31.4%) had corpora lutea (CL). Six animals (8.6%) had corpora haemorrhagica. Of the 22 animals exhibiting CL, 12 (54.5%) had CL of pregnancy and were with calf, while 10 (45.5%) others had those of normal oestrous cycle. Corpora albicans (CA) counts showed that 90 (81.8%) of the cows had calved at least once, the mean being 4.5 calves per cow. Fifty-eight cows (52.7%) had calved 0-2 times, 34 (30.9%) 3-5 times and 18 (16.3%) 6-8 times. The mean estradiol-17β levels in follicular fluid (1669.6 ± 9.7 pg/mL) were significantly higher than that of the serum (85.5 ± 0.8 pg/mL). The non-pregnant cyclic with corpus luteum group had the highest follicular estradiol concentration (2558.8 ± 8.9 pg/mL), while the pregnant group had the lowest (858.5 ± 6.8 pg/mL). The mean serum estradiol level among pregnant cows was 115.7 ± 1.2 pg/mL. Low levels of serum estradiol-17β were consistently recorded among animals having active ovaries and good volume of follicular fluid, indicating that they were reproductively active and were being sold for reasons other than infertility. |
| Databáze: | OpenAIRE |
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