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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著者

    • Miura Hiroshi MIURA Hiroshi
    • Department of Clinical Veterinary Theriogenology, School of Veterinary Medicine and Animal Sciences, Kitasato University
    • Kotani Satoko KOTANI Satoko
    • Department of Clinical Veterinary Theriogenology, School of Veterinary Medicine and Animal Sciences, Kitasato University
    • OHTSUKA Hiromichi
    • Department of Veterinary Internal Medicine, School of Veterinary Medicine and Animal Sciences, Kitasato University
    • KIKUCHI Motohiro
    • Department of Clinical Veterinary Theriogenology, School of Veterinary Medicine and Animal Sciences, Kitasato University
    • OHNAMI Yoji
    • Department of Clinical Veterinary Theriogenology, School of Veterinary Medicine and Animal Sciences, Kitasato University

抄録

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 F<sub>2</sub><sub>α</sub>. 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, Japan). 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, P<sub>4</sub>+) was significantly higher than that of the low progesterone group (less than 1 ng/ml, P<sub>4</sub>-; 47.9% <i>vs.</i> 28.6% P<0.01). In the P<sub>4</sub>- 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 P<sub>4</sub>+ 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 P<sub>4</sub> was observed. We concluded that 1) the conception rate of the P<sub>4</sub>- group was remarkably low, that 2) the low conception rate and low P<sub>4</sub> 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 P<sub>4</sub> was found.<br>

収録刊行物

  • The Journal of reproduction and development  

    The Journal of reproduction and development 54(3), 214-216, 2008-06-01 

    THE SOCIETY FOR REPRODUCTION AND DEVELOPMENT

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各種コード

  • NII論文ID(NAID)
    10021219479
  • NII書誌ID(NCID)
    AA10936678
  • 本文言語コード
    ENG
  • 資料種別
    NOT
  • ISSN
    09168818
  • NDL 記事登録ID
    9543091
  • NDL 雑誌分類
    ZR22(科学技術--農林水産--畜産)
  • NDL 請求記号
    Z54-H305
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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