Relationships between the Conception Rate of Estrus Synchronization Using Estradiol Benzoate and CIDR (Progesterone) and Other Parameters in Holstein Lactating Dairy Cows
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概要
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The purpose of this study was to determine the relationships between conception rate and other parameters before estrus synchronization with a Controlled Internal Drug Release Device (CIDR) and estradiol benzoate (EB). In the estrus synchronization program, animals were injected with 2 mg EB and then received a CIDR. Seven days later, the CIDR was removed and the animals were given an injection of Prostaglandin F2α. Twenty-four hours later, they received an injection of 1 mg EB, and they were artificially inseminated 24 h after that. This program was applied to 258 Holstein cows in Tohoku-machi, Aomori Prefecture. Blood was collected at the beginning of the program, and the conception rate was determined about 40 days after insemination. The relationships among conception rate, blood biochemical values, age, body condition score and days in milk were statistically analyzed to determine better conditions for cow conception. The conception rate of the cows in the high progesterone group (more than 1 ng/ml, P4+) was significantly higher than that of the low progesterone group (less than 1 ng/ml, P4-; 47.9% vs. 28.6% P<0.01). In the P4- groups, the serum phospholipid level was significantly higher in the conception group than in the non-conception group, and the same tendency was seen in the P4+ groups. Blood urea nitrogen (BUN), albumin (Alb), and total cholesterol (TChol) were significantly higher in the conception group compared with the non-conception group, but no with P4 was observed. We concluded that 1) the conception rate of the P4- group was remarkably low, that 2) the low conception rate and low P4 level was related to a low PL level and that 3) BUN, Alb and TChol were higher in the conception group, although no relation with P4 was found.
- 日本繁殖生物学会の論文
- 2008-06-01
著者
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MIURA Hiroshi
Department of Pathology, Matsue Red Cross Hospital
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Kikuchi Motohiro
Department Of Clinical Veterinary Theriogenology School Of Veterinary Medicine And Animal Sciences K
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Ohtsuka Hiromichi
Department Of Veterinary Internal Medicine School Of Veterinary Medicine And Animal Sciences Kitasat
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KOTANI Satoko
Department of Clinical Veterinary Theriogenology, School of Veterinary Medicine and Animal Sciences,
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KOHIRUIMAKI Masayuki
Department of Veterinary Internal Medicine, School of Veterinary Medicine and Animal Sciences, Kitas
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OHNAMI Yoji
Department of Clinical Veterinary Theriogenology, School of Veterinary Medicine and Animal Sciences,
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Ohnami Yoji
Department Of Clinical Veterinary Theriogenology School Of Veterinary Medicine And Animal Sciences K
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Kotani Satoko
Department Of Clinical Veterinary Theriogenology School Of Veterinary Medicine And Animal Sciences K
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Kohiruimaki Masayuki
Department Of Large Animal Clinical Sciences School Of Veterinary Medicine Rakuno Gakuen University
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Kohiruimaki Masayuki
Department Of Veterinary Internal Medicine School Of Veterinary Medicine And Animal Sciences Kitasat
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Miura Hiroshi
Department Of Applied Chemistry Saitama University
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Miura Hiroshi
Department Of Clinical Veterinary Theriogenology School Of Veterinary Medicine And Animal Sciences K
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