| Studies on the improvement of reproductive efficiency in Korean native cows -The use of plasma progesterone concentrations for early pregnancy diagnosis- |
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Byong-kyu Kang1, Han-sun Choi1, Chung-gill Lee1, Son Chang-ho1, Guk-hyun Suh2 |
1College of Veterinary Medicine, Chonnam National University
2Namwon Branch, National Animal Breeding Institute |
| 한우(韓牛)의 번식효율(繁殖效率) 증진(增進)에 관한 연구(硏究) -Progesterone농도(濃度) 측정(測定)에 의한 조기임신진단(早期姙娠診斷)- |
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강병규1, 최한선1, 이정길1, 손창호1, 서국현2 |
1전남대학교 수의과대학
2국립종축원 남원지원 |
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| Abstract |
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Plasma progesterone concentrations were measured in 24 Korean native cows by a radioimmunoassay at 0, 6 and 20 days after insemination. As a result, 23 cows (95.8%) were judged to be in estrus with ovulation and one cow (4.2%) was judged to be in estrus without ovulation. Plasma progesterone concentrations at 20 days after insemination were $5.11{pm}1.33$ (mean${pm}$SD, range 3.20~7.86) ng/ml in pregnant cows and $0.35{pm}0.10$ (range 0.30~0.50) ng/ml in nonpregnant cows. Of the 20 cows, 18 cows were confirmed the pregnant by rectal palpation at 60 days after insemination. The accuracy of the pregnancy diagnosis based on plasma progesterone concentration was 90 % for positive case and 100% for negative case. |
| Key Words:
progesterone, early pregnancy diagnosis, Korean native cow |
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