Efficacy of GnRH-PGF<SUB>2α</SUB>-hCG for Ovulation Synchronization and Timed AI in Dairy Cows
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- SATO Taro
- Livestock Research Center, Niigata Agricultural Research Institute
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- NAKADA Ken
- 酪農学園大学獣医学部
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- 長井 太一
- 新潟県農業技術学院
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- KIMURA Yoshinori
- Livestock Research Center, Niigata Agricultural Research Institute
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- FUJIWARA Nobuko
- Livestock Research Center, Niigata Agricultural Research Institute
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- UMEDA Masao
- Livestock Research Center, Niigata Agricultural Research Institute
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- FURUKAWA Takeshi
- Livestock Research Center, Niigata Agricultural Research Institute
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- MORIYOSHI Masaharu
- 酪農学園大学獣医学部
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- SAWAMUKAI Yutaka
- 酪農学園大学獣医学部
Bibliographic Information
- Other Title
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- 乳牛におけるGnRHとPGF<SUB>2α</SUB>およびhCG投与による排卵同期化および定時人工授精の検討
- 乳牛におけるGnRHとPGF2αおよびhCG投与による排卵同期化および定時人工授精の検討
- ニュウギュウ ニ オケル GnRH ト PGF2 アルファ オヨビ hCG トウヨ ニ ヨル ハイラン ドウキカ オヨビ テイジ ジンコウ ジュセイ ノ ケントウ
- Efficacy of GnRH-PGF2^|^alpha;-hCG for Ovulation Synchronization and Timed AI in Dairy Cows
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Description
The present study was carried out to determine the efficacy of replacing the second GnRH with hCG (GnRHPGF2αhCG) in Ovsynch used for timed AI in cows. In the firstexperiment, Holstein cows were divided into 3 groups according to post-estrus day: day 5-6, day 10-11, and day 15-16 (n = 5 for each group). In each group, ovulation was highly synchronized in cows treated with GnRH-PGF2α-hCG (hCG: 3, 000 IU). In thesecond experiment, Holstein cows were randomly divided into 2 groups and each cow was treated with either GnRHPGF2α-hCG (n=42) or Ovsynch (n=41). Conception rates were 52.4% for cows treated with GnRH-PGF2α-hCG and 51.2% for cows treated with Ovsynch. It was estimated that replacisng GnRH with hCG for ovulation synchronization saved \703 per cow and Y1, 533 per conception. These results show that ovulation synchronization and timed AI for dairy cows can be performed without conception-rate reduction and at lower costs by replacing the second GnRH with hCG in Ovsynch.
Journal
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- Journal of the Japan Veterinary Medical Association
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Journal of the Japan Veterinary Medical Association 56 (5), 316-319, 2003
Japan Veterinary Medical Association
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Details 詳細情報について
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- CRID
- 1390282679687240960
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- NII Article ID
- 10011901039
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- NII Book ID
- AN00191857
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- COI
- 1:CAS:528:DC%2BD3sXkslWrsrc%3D
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- ISSN
- 21860211
- 04466454
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- NDL BIB ID
- 6539157
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed