Relations between Plasma IGF-I Concentrations during Treatment with CIDR-based or Ovsynch Protocol for Timed AI and Conception in Early Postpartum Japanese Black Beef Cows
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- KAWATE Noritoshi
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
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- SAKASE Mitsuhiro
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University Northern Center of Agricultural Technology, General Technological Center of Hyogo Prefecture for Agriculture, Forestry and Fishery
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- SEO Yasutaka
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
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- FUKUSHIMA Moriyuki
- Northern Center of Agricultural Technology, General Technological Center of Hyogo Prefecture for Agriculture, Forestry and Fishery
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- NODA Masanobu
- Northern Center of Agricultural Technology, General Technological Center of Hyogo Prefecture for Agriculture, Forestry and Fishery
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- TAKEDA Kazushi
- Northern Center of Agricultural Technology, General Technological Center of Hyogo Prefecture for Agriculture, Forestry and Fishery
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- UENO Satoru
- Northern Center of Agricultural Technology, General Technological Center of Hyogo Prefecture for Agriculture, Forestry and Fishery
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- INABA Toshio
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
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- KIDA Kayoko
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
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- TAMADA Hiromichi
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
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- SAWADA Tsutomu
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
Bibliographic Information
- Other Title
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- 分娩後早期黒毛和種牛におけるCIDR併用もしくはOvsynch定時人工授精法の処置中における血漿中IGF-I濃度と受胎との関係
- Relations between Plasma IGF-1 Concentrations during Treatment with CIDR-based or Ovsynch Protocol for Timed AI and Conception in Early Postpartum Japanese Black Beef Cows
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Description
We examined the relations between plasma insulin-like growth factor (IGF) -I concentrations during treatment with CIDR-based or Ovsynch protocol for timed AI and conception and plasma steroid concentrations in early postpartum Japanese Black beef cows. Cows in the control group (Ovsynch; n=21) underwent Ovsynch protocol (GnRH analogue on Day 0, PGF2α analogue on Day 7, and GnRH analogue on Day 9), with AI on Day 10, approximately 20 h after the second GnRH treatment. Cows in the Ovsynch+CIDR group (n=22) received Ovsynch protocol plus a CIDR for 7 days (starting on Day 0). Cows in the further treatment group (EB+CIDR+GnRH; n=22) received 2 mg of estradiol benzoate (EB) on Day 0 in lieu of the first GnRH treatment, followed by the same treatment as in the Ovsynch+CIDR protocol. Plasma IGF-I concentrations were determined on Days -7, 0, 7, 9 and 17. Conception rates were improved in the CIDR-combined groups (both CIDR-treated groups were combined) relative to Ovsynch group (P<0.05) for cows with low IGF-I concentrations (<1,000 ng/ml) on Days -7, 0, and 7, but improved conception rate produced by the CIDR-based protocols did not occur in cows with a high IGF-I concentration (≥1,000 ng/ml). Plasma estradiol-17β concentrations increased from Day 0 to 7 (P<0.05) and were unchanged from Day 7 to 9 in the Ovsynch group with low IGF-I concentrations on Day 0, while they were unchanged from Day 0 to 7 and increased from Day 7 to 9 (P<0.05) in the Ovsynch group with high IGF-I concentrations on Day 0 and in the CIDR-combined group. Plasma progesterone concentrations in the Ovsynch group with low IGF-I concentrations on Day 0 were higher on Day 14 than in the Ovsynch group with high IGF-I concentrations on Day 0 and in the CIDR-combined group (P<0.05). In conclusion, CIDR-based protocols may improve conception relative to Ovsynch in early postpartum beef cows with lower plasma IGF-I concentrations at the start of the protocols. This improvement is probably due to prevention of premature increases of estradiol-17β and progesterone concentrations, which occurred in cows with low IGF-I concentrations treated with Ovsynch, by the CIDR treatment.<br>
Journal
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- Journal of Reproduction and Development
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Journal of Reproduction and Development 52 (1), 81-89, 2006
The Society for Reproduction and Development
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Details 詳細情報について
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- CRID
- 1390282681311722496
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- NII Article ID
- 10020353333
- 130000054657
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- NII Book ID
- AA10936678
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- ISSN
- 13484400
- 09168818
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- NDL BIB ID
- 7833077
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- PubMed
- 16293942
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- Text Lang
- en
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
- OpenAIRE
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- Abstract License Flag
- Disallowed