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젖소 미경산우의 발정동기화 처리 시 번식호르몬 변화Changes in Concentrations of Reproductive Hormones during Estrus Synchronization in Dairy Heifers
- Other Titles
- Changes in Concentrations of Reproductive Hormones during Estrus Synchronization in Dairy Heifers
- Issue Date
- 2013
- Publisher
- 사단법인 한국동물생명공학회
- Keywords
- Estrus synchronization; Dairy cattle; P4; E2; Corpus luteum
- Citation
- Reproductive & Developmental biology, v.37, no.1, pp 29 - 33
- Pages
- 5
- Indexed
- KCI
- Journal Title
- Reproductive & Developmental biology
- Volume
- 37
- Number
- 1
- Start Page
- 29
- End Page
- 33
- ISSN
- 1738-2432
- Abstract
- The objective of this work was to analyze the concentrations of progesterone (P4) and estrogen (E2) hormones changed during estrus synchronization in dairy heifers. Estrus synchronization was carried out with CIDRⓇ (Controlled Intravaginal Drug Release) devices. Corpus luteum (CL) was classified into three grades based on its size and palpable characteristics. The concentrations of P4 and E2 were measured by enzyme-amplified chemiluminescence. Serum P4 concentration was markedly low at the estrus stage (36 hrs after removal of CIDR) compared to other stages, while E2 concentration was kept high during estrus stage. The serum P4 concentration was highest in the CL classified into gradeⅠ. These results indicate that P4 concentration could be used as a criteria for determining recipients for artificial insemination or embryo transfer in dairy cattle.
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