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Relationship between the First Ovulation within Three Weeks Postpartum and Subsequent Ovarian Cycles and Fertility in High Producing Dairy Cows
| 名前 / ファイル | ライセンス | アクション |
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m070322-1.pdf (187.8 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||||||||||||||||||
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| 公開日 | 2007-03-22 | |||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||
| タイトル | Relationship between the First Ovulation within Three Weeks Postpartum and Subsequent Ovarian Cycles and Fertility in High Producing Dairy Cows | |||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
| 言語 | ||||||||||||||||||||||||||
| 言語 | eng | |||||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||||||||||
| 主題 | dairy cow | |||||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||||||||||
| 主題 | first ovulation | |||||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||||||||||
| 主題 | postpartum | |||||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||||||||||
| 主題 | resumption of ovarian cycle | |||||||||||||||||||||||||
| 資源タイプ | ||||||||||||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||||||||||
| 資源タイプ | journal article | |||||||||||||||||||||||||
| 著者 |
川島, 千帆
× 川島, 千帆
WEKO
88
× 金子, 悦史× Amaya, Montoya Carlos× 松井, 基純
WEKO
132
× 山岸, 則夫
WEKO
300
× 松長, 延吉× 石井, 三都夫× 木田, 克弥× 三宅, 陽一
WEKO
150
× 宮本, 明夫
WEKO
151
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| 抄録 | ||||||||||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||||||||||
| 内容記述 | The aim of this study was to investigate the relationship between the first ovulation within 3 weeks postpartum and subsequent ovarian cycles and fertility in high producing dairy cattle in Hokkaido, Japan. In Experiment 1, 110 cows (44 primiparous and 66 multiparous) were used to determine the effects of the first ovulation within 3 weeks postpartum on subsequent ovarian cycles. Milk samples were collected twice weekly from 7 to 100 days postpartum. The first ovulation was identified by an increase in milk progesterone (P4) to more than 1 ng/ml within 3 weeks postpartum. The numbers of cows showing ovulation and anovulation within 3 weeks postpartum were 31 (70.5%) and 13 (29.5%) in the primiparous cows and 35 (53.0%) and 31 (47.0%) in the multiparous cows, respectively. The patterns of ovarian resumption after calving were classified into two types (normal ovarian cycles and abnormal ovarian cycles) on the basis of milk P4 concentrations. Initiation of normal ovarian function in cows ovulated within 3 weeks postpartum occurred earlier than in anovulated cows regardless of the number of calvings (primiparous, 27.8 days vs. 44.4 days; multiparous, 30.6 days vs. 55.7 days; P < 0.01). Out of the multiparous cows that ovulated within 3 weeks postpartum, initiation of normal ovarian function followed by a normal luteal phase was earlier than when it was followed by an abnormal luteal phase (25.5 days vs. 40.4 days; P < 0.05). Milk P4 concentrations after the first ovulation were lower than those after the second ovulation in both the primiparous and multiparous cows (P < 0.05). In Experiment 2, 22 multiparous cows were used to determine the effects of the first ovulation within 3 weeks postpartum on subsequent fertility. Blood samples were collected once a week from 0 to 3 weeks postpartum. The interval from parturition to first service in ovulated cows was shorter than in anovulated cows (68.4 days vs. 94.8 days; P < 0.05). The conception rate by 100 days after calving tended to be higher in ovulated cows than in anovulated cows (50.0% vs. 16.7%, P=0.09). In conclusion, our data strongly suggests that ovulation within 3 weeks postpartum is a crucial phenomenon for subsequent resumption of ovarian function and conception, and thus it can be used as an index of subsequent reproductive performance. | |||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
| 書誌情報 |
en : Journal of Reproduction and Development 巻 52, 号 4, p. 479-486, 発行日 2006-08 |
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| 出版者 | ||||||||||||||||||||||||||
| 出版者 | Japanese Society of Animal Reproduction | |||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
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| 収録物識別子タイプ | PISSN | |||||||||||||||||||||||||
| 収録物識別子 | 09168818 | |||||||||||||||||||||||||
| 書誌レコードID | ||||||||||||||||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||||||||||||||||
| 収録物識別子 | AA10936678 | |||||||||||||||||||||||||
| 権利 | ||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
| 権利情報 | Japanese Society of Animal Reproduction | |||||||||||||||||||||||||
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| 内容記述タイプ | Other | |||||||||||||||||||||||||
| 内容記述 | application/pdf | |||||||||||||||||||||||||
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| 出版タイプ | VoR | |||||||||||||||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||||||||||||||
