| Therapeutic effect of prostaglandin F2α on anestrus in Cheju pony mares |
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Deog-gi Chang1, Ki-chun Yang2, Jung-kye Kim2, Moon-hean Suh3 |
1Cheju Vocational Junior College
2Cheju National University
3Cheju Provincial Livestock Development Center |
| PGF2α처리(處理)에 의한 무발정(無發情) 제주마(濟州馬)의 치료효과(治療效果) |
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장덕지1, 양기천2, 김중계2, 서문현3 |
1제주전문대학
2제주대학교 농과대학
3제주도축산사업소 |
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| Abstract |
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The effects of $PGF2{alpha}$ on the conception rate and the plasma levels of estradiol-$17{eta}$ and progesterone of anestrus Cheju mares were investigated at the breeding and non-breeding seasons. The results obtained from this studies are as follows; 1. The durations of the estrus and diestrus after $PGF_2{alpha}$ treatment persisted shorter than control cycle (p<0.05), but ovulation time was fast. 2. The levels of estradiol-$17{eta}$ and progesteron before $PGF_2{alpha}$ treatment showed 103.8pg/ml, 8.0ng/ml in breeding season and 72.8pg/ml, 4.7ng/ml in non-breeding season, respectively. 3. The levels of estradiol-$17{eta}$ rose to 115.4~154.0pg/ml, and 90.8~27.0pg/ml from 2nd to 6th day after the treatment of $PGF_2{alpha}$, in breeding and non-breeding seasons, respectively, while progesterone level dropped to 1ng/ml with the sign of estrus and at 8th day rose in breeding season (p<0.05). 4. Of thirty anestrus mares investigated for $PGF_2{alpha}$ administration, 87.5% showed estrus on an average of 3.8 days after treatment and the conception rate was 62.5% in breeding season, but the estrus and conception rates dropped 40% and 20% in non-breeding season, respectively. |
| Key Words:
anestrus Cheju mares, estradiol-$17{eta}$, progesterone, breeding season, conception rate |
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