The results of consecutive superovulations in cows by induction with various exogenous progesterone routes
| Autor: | Sedat Hamdi Kizil, Muharrem Satilmiş, Numan Akyol, Tahir Karaşahin, Serkan Erat |
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| Přispěvatelé: | Kırıkkale Üniversitesi |
| Jazyk: | turečtina |
| Rok vydání: | 2014 |
| Předmět: |
Estrous cycle
medicine.medical_specialty General Veterinary Key words: Cattle exogenous progesterone consecutive superovulation Superovulations Uterus Embryo Biology consecutive superovulation Andrology medicine.anatomical_structure CLs upper limits Endocrinology Internal medicine medicine Cattle exogenous progesterone Implant Corpus luteum |
| Zdroj: | Volume: 38, Issue: 2 157-160 Turkish Journal of Veterinary and Animal Sciences |
| ISSN: | 1300-0128 1303-6181 |
| Popis: | KARASAHIN, Tahir/0000-0003-2358-0389 WOS: 000331515700007 The aim of this study was to determine the possibility of yielding more transferable embryos from cows superovulated with/without exogenous progesterone (ear implant and intravaginal device). Two experiments were conducted in Holstein Friesian cows to evaluate the effect of exogenous progesterone on the yield of corpus luteum (CL), total embryo and ova, and transferable embryos before superovulation. A superovulation program using 2 different progesterone resources was applied (G1 = intravaginal device, G2 = ear implant). Superovulation and uterus irrigations were done at 28-day intervals in the treatment groups. Cows in the control group were superovulated at 60-day intervals without application of exogenous progesterone. The mean numbers of CLs and transferable embryos for the G1, G2, and control groups were, respectively 4.82 +/- 0.29, 6.71 +/- 0.29, and 7.81 +/- 0.31 for CLs and 0.86 +/- 0.35, 3.50 +/- 0.35, and 1.53 +/- 0.39 for transferable embryos. It was shown that exogenous manipulation of the estrus cycle by progesterone could be applied without superovulation intervals in Holstein cows. It may also be postulated that the ear implant was more effective than the intravaginal device as a progesterone source in the superovulation program. |
| Databáze: | OpenAIRE |
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