A Potential Use of Color Ultrasound as a Tool for Reproductive Management : New Observations Using Color Ultrasound Scanning that were not Possible with Imaging Only in Black and White
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概要
- 論文の詳細を見る
Ultrasonography (US) has been applied to the ovary and the uterus of domestic animals from the late 1980s, and established in 1990s as a practical tool for animal production. US made it possible to detect pregnancy at a very early stage and, most importantly, to observe the real-time dynamics of follicular development and hence the discovery of follicular waves. This has greatly contributed to our understanding of ovarian physiology and helped us to develop several "pin-point" protocols for hormonal treatment. While US may not seem to fit preconceived ideas of a "green" technology, it does not contravene environmental priorities, and it is non-invasive ("ethical") and non-hormonal ("clean"). Using the US technology that is now commercially available at a reasonable price, we are able to estimate the best timing for AI and this allows us to plan either the use of precisely-timed nutritional supplements for fetal development or an immediate 2nd AI service to achieve a better economic efficiency. During the last few years, we have also begun to be able to observe in detail the local blood flow in individual ovarian follicles and CL using color Doppler ultrasonography in the cow. From the series of observations, we have found that: 1) the change of blood supply to an individual follicle closely relates to the dynamics of follicular growth and atresia; 2) the local blood flow detected in the theca externa of mature follicles rapidly increases around the onset of LH surge and is most active before ovulation; 3) the blood supply to the developing CL increases in parallel with CL volume and plasma progesterone concentrations; and 4) the local blood flow surrounding the mature CL acutely increases prior to the onset of luteolysis in response to uterine as well as exogenous PGF2α. It is now clear that color Doppler ultrasound is very useful for observing echogenicity with local blood flow thereby providing an easily obtained estimation of the physiological status of follicles, CLs and early conceptus. Widespread commercial application of color US will depend on further technological developments that reduce the cost and improve performance and ease-of-use. Overall, US is now a most effective non-invasive tool for managing reproduction, at the level of both the individual animal and the herd system. In particular, US can help us to clarify potential problems in high-producing dairy cattle during the postpartum period.
- 日本繁殖生物学会の論文
- 2006-02-01
著者
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ACOSTA Tomas
Laboratory of Reproductive Endocrinology, Graduate School of Natural Science and Technology, Okayama
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Miyamoto Akio
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture & Veterinary Medicine
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SHIRASUNA Koumei
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicin
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MATSUI Motozumi
Department of Clinically Veterinary Sciences, Obihiro University of Agriculture and Veterinary Medic
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Acosta Tomas
Lab. Of Reproductive Endocrinology Graduate School Of Natural Sci. And Technol. Okayama Univ.
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Acosta Tomas
Laboratory Of Reproductive Endocrinology Graduate School Of Natural Science And Technology Okayama U
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アコスタ トマスj
帯広畜産大学・畜産管理学科
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Sasahara Kiemi
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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Sasahara Kiemi
帯広畜産大学 大学院畜産衛生学
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Miyamoto Akio
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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宮本 明夫
帯広畜産大
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Acosta Tomas
Graduate School Of Natural Science And Technology Okayama University
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Kawashima Chiho
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicin
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Matsui Motozumi
Lab. Of Theriogenology Dep. Of Applied Veterinary Medicine Obihiro Univ. Of Agriculture And Veterina
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Kawashima Chiho
Graduate School Of Animal And Food Hygiene Obihiro Univ. Of Agriculture And Veterinary Medicine
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Kawashima Chiho
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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Shirasuna Koumei
Graduate School Of Animal And Food Hygiene Obihiro Univ. Of Agriculture And Veterinary Medicine
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Shirasuna Koumei
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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HAYASHI Ken-Go
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicin
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KAMADA Daichi
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicin
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KANEKO Etsushi
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicin
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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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Matsui Motozumi
Department Of Clinically Veterinary Sciences Obihiro University Of Agriculture And Veterinary Medici
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Kamada Daichi
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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Hirabayashi Keiji
Department Of Animal Production Ikuta Campus Meiji University
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Kaneko Etsushi
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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松井 基純
The United Graduate School Of Veterinary Sciences Gifu University
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宮本 明夫
帯広畜産大学・畜産科学科
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Hayashi Ken‐go
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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Acosta T
Department Of Theriogenology Obihiro University Of Agriculture And Veterinary Medicine
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Miyamoto Akio
Graduate School Of Animal And Food Hygiene Obihiro Univ. Of Agriculture And Veterinary Medicine
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Matsui Motozumi
Department Of Clinical Veterinary Science Obihiro University Of Agriculture And Veterinary Medicine
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MATSUI Motozumi
Department of Agricultural and Life Science, Obihiro University of Agriculture and Veterinary Medicine
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ACOSTA Tomas
Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine
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