지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.1
- 수록면
- 165 - 174 (10page)
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초록· 키워드
오류제보하기
For horse breeders or managers, it is critical to understand the estrous cycle of mares. Breeding of mares cannot be successfully achieved throughout the whole year as mares breed seasonally. Mares are only able to breed when day length is more than 16 h, and this period is known as the breeding season. Their estrous cycle is approximately 21 days with 5-7 days of estrus and 14 to 15 days of a diestrus period. The estrous cycle of the mare is mainly controlled by gonadotropins, which control follicular development and ovulation. Mares exhibit unique ovulatory events which are not observed in other species. A LH surge occurs for several days, with levels of LH reaching their peak after ovulation. The LH level at the time of LH peak is lower than most other species. The unique anatomical structure of the ovaries of mares is known to limit the number of eggs ovulated. Several attempts have been made to develop chemical/hormonal agents which might be used to manipulate the timed ovulation of mares. Agents that have been tested include hCG, native GnRH, Deslorelin(Ovuplant, GnRH-agonist), Buserelin (GnRH analogue), equine pituitary extracts and equine chorionic gonadotropin(eCG or PMSG). However, the function, purity or stability of these agents is not reliable. Recombinant equine LH, an alternative agent for the timed ovulation, has been developed and tested for its biological activities, through the use of both in vitro and in vivo experiments. The reLH was suggested to be a reliable agent in inducing ovulation within 48 h after being administered through injection, when the size of dominant follicle is 35 mm in diameter.
목차
등록된 정보가 없습니다.
참고문헌 (26)
참고문헌 신청
Adashi, E. Y. / 1996 / The ovarian follicular apparatus / Lippincott- Raven
Al-Inany, H. G. / 2005 / Recombinant versus urinary human chorionic gonado- trophin for ovulation induction in assisted conception / Cochrane Database Syst Rev : CD003719 ~
Alexander, S. L. / 1987 / Secretion rates and short-term patterns of gonadotrophin-releasing hormone, FSH and LH throughout the periovulator yperiod in the mare / J Endocrino
Allen, W. E. / 1975 / Ovarian changes during early pregnancy in pony mares in relation to PMSG production / J Reprod Fertil Suppl : 425 ~ 428
Allen, W. R. / 1972 / The origin of the equine endometrial cups. I. Production of PMSG by fetal trophoblast cells / J Reprod Fertil 29 : 313 ~ 316
Al-Inany, H. G. / 2005 / Recombinant versus urinary human chorionic gonado- trophin for ovulation induction in assisted conception / Cochrane Database Syst Rev : CD003719 ~
Alexander, S. L. / 1987 / Secretion rates and short-term patterns of gonadotrophin-releasing hormone, FSH and LH throughout the periovulator yperiod in the mare / J Endocrino
Allen, W. E. / 1975 / Ovarian changes during early pregnancy in pony mares in relation to PMSG production / J Reprod Fertil Suppl : 425 ~ 428
Allen, W. R. / 1972 / The origin of the equine endometrial cups. I. Production of PMSG by fetal trophoblast cells / J Reprod Fertil 29 : 313 ~ 316
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