| A study on the concentrations of milk progesterone in dairy cattle with ovarian reproductive disorders |
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Jung-yun Cho1, Byeong-han Lee1, Young-sun Kang1, Jin-young Kim1, Soon-hak Yook2, Soek-hwa Choi3, Jong-bae Kim1, Hwa-joong Yoon1, Byung-hyun Chung1 |
1College of Animal Husbandry, Kon-Kuk University
2Doosan Technical Center
3College of Veterinary Medicine, Chungbuk National University |
| 젖소의 난소질환별 Milk Progesterone 수준에 관한 연구 |
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조정연1, 이병한1, 강영선1, 김진영1, 육순학2, 최석화3, 김종배1, 윤화중1, 정병현1 |
1건국대학교 축산대학
2두산기술원
3충북대학교 수의과대학 |
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| Abstract |
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The relationship between palpable ovarian structure and milk progesterone levels were determined in 144 dairy cows. Depending on the ovarian structure and diseases were divided into two groups, Group I (absence of functional luteal tissue in ovary and <2ng/ml in milk progesterone levels) and Group II(presence of functional luteal tissue in ovary and ${geq}2ng/ml$ in milk progesterone levels) 1. Among 69 cows of group I, dysfunction of ovary, atropy of ovary, follicle is ovary, follicular cyst and corpus luteum albicans were 17(11.8%), 19(13.2%), 14(9.7%), 3(2.1%) and 16 cows(11.1%), and among 75 cows of group II, corpus luteum A, B and C were 16(11.1%), 17(11.8%) and 42 cows(29.2%), respectively. 2. In Group I, milk progesterone concentrations were <1ng/ml in 55 cows(79.9%). Conversely in Ggroup II, milk progesterone concentrations were ${geq}4ng/ml$ in 55 cows(73.3%). 3. The mean(${pm}SE$) concentrations of milk progestsrone in the Group I and II were $1.62{pm}0.45$ and $7.64{pm}0.68ng/ml$, respectively, and CR test showed the difference in milk progesterone concentrations between the two groups to be statistically significant(p<0.01). 4. The mean(${pm}SE$) concentration of milk progesterone in cows with corpus luteum A, B and C were $8.11{pm}1.83$, $8.48{pm}1.30$ and $7.12{pm}0.82ng/ml$, respectively, there was no significant relationship between palpable corpora luteum structure and milk progesterone concentration. 5. The accuracy of ovarian diagnosis was 82.6 and 20.2% in the Group I and II, respectively, and Chi-square test showed the difference in accuracy between the two groups to be statistically significant (p<0.001). 6. The agreement between the rectal palpation and milk progesterone concentrations in ovarian disease was 50%. |
| Key Words:
milk progesterone, ELISA, reproductive disorders, dairy cattle |
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