Colour Doppler Sonography of Cystic Ovarian Follicles in Cows
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概要
- 論文の詳細を見る
The goals of the present study were to investigate whether colour Doppler sonography can be used to differentiate temporary from persistent ovarian follicles and follicles with luteal tissue from follicles without luteal tissue and to assess the response of follicular cysts to administration of a GnRH analogue. Fifty-four cows having ovarian follicular structures with a diameter of >15 mm but no corpus luteum were included. These cows were examined via B-mode and colour Doppler sonography. The same examinations were repeated 10 to 12 days later, and the cows with follicular cysts (n=17) received a GnRH analogue. Blood flow was measured before and 30 min after treatment. Ten to 12 days later, the response to treatment was assessed using B-mode sonography. While 31 of 54 follicles disappeared spontaneously (temporary follicles), 23 follicles persisted and were diagnosed as cystic ovarian follicles (COFs). There was no difference between temporary follicles and COFs in regard to total area, wall thickness or the perfused area. In the luteinized follicles (n=13), based on the plasma progesterone concentration, total area was twice as large, wall thickness was three times greater and the perfused area was 4.5 times larger than those of the non-luteinized follicles (n=41). The sensitivity of diagnosing luteinized follicles was 61.5% using B-mode sonography and 92.3% using colour Doppler sonography. Twelve cows responded to GnRH, and five cows did not. There was a trend (P=0.07) toward higher (59.3%) blood flow in the cyst wall 30 min after treatment in the responding cows compared with the non-responding cows. Our results showed that the perfused area more accurately reflects active luteal tissue than wall thickness. Thus, colour Doppler sonography is superior to B-mode sonography for differentiating follicular and luteal cysts and aids in the selection of treatment. However, exact prediction of COFs destined to regress or persist and the response of COFs to treatment with a GnRH analogue were not possible using colour Doppler sonography.
- 日本繁殖生物学会の論文
- 2008-12-01
著者
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Miyamoto Akio
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture & Veterinary Medicine
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Kruger Lars
Clinic For Cattle University Of Veterinary Medicine Hannover
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Miyamoto Akio
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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RAUCH Alexandra
Clinic for Cattle, University of Veterinary Medicine Hannover
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BOLLWEIN Heinrich
Clinic for Cattle, University of Veterinary Medicine Hannover
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Amaya Montoya
帯広畜産大学 畜産学研究科畜産衛生学
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Rauch Alexandra
Clinic For Cattle University Of Veterinary Medicine Hannover
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Bollwein Heinrich
Clinic For Cattle University Of Veterinary Medicine Hannover
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宮本 明夫
帯広畜産大学・畜産科学科
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Miyamoto A
Laboratory Of Animal Genetics And Reproduction Obihiro University Of Agriculture And Veterinary Medi
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Bollwein Heinrich
Clinic For Cattle School Of Veterinary Medicine Hannover
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Miyamoto Akio
Graduate School Of Animal And Food Hygiene Obihiro Univ. Of Agriculture And Veterinary Medicine
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Miyamoto Akio
Laboratory Of Animal Genetics And Reproduction Obihiro University Of Agriculture And Veterinary Medi
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