원문정보
Changes in Concentrations of Reproductive Hormones during Estrus Synchronization in Dairy Heifers
초록
영어
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.
목차
서론
재료 및 방법
젖소 발정동기화
P4, E2 호르몬 농도 분석
황체 발달 등급 확인
통계분석
결과 및 고찰
발정동기화 처리 시기별 P4, E2 농도 변화
발정동기화 처리에 따른 황체 발달 등급 및 등급별 P4 농도
발정동기화 처리에 따른 수정란이식 당일 수란우의 P4 농도 분석
인용문헌