未性成熟豚におけるPMSG-hCGによる排卵の同期化

DOI 日本農学文献記事索引 Web Site 被引用文献2件 参考文献15件

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タイトル別名
  • Synchronization of ovulation by PMSG-hCG in the prepuberal gilts.
  • 未性成熟豚におけるＰＭＳＧ‐ｈＣＧによる排卵の同期化
  • ミ セイ セイジュク ブタ ニ オケル PMSG-hCG ニヨル ハイラン ノ

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The present study was conducted to clarify the possibility of synchronization of ovulation by PMSG-hCG injection in the prepuberal gilts. Seventy nine gilts were injected intramuscularly 1, 000IU of PMSG. Thirty four of them were injected intramuscularly 3ml of physiological sodium chloride solution 72 hours after PMSG injection (PMSG group). The other fourty five gilts were injected intramuscularly 500IU of hCG 72 hours after PMSG injection (PMSG-hCG group). Each of 3 to 10 of the treated gilts was laparotomied on 0, 1, 2, 3, 4 or 5 days after physiological sodium chloride solution or hCG injection (day 0=day of physiological sodium chloride solution or hCG injection) and examined the ovulation. In PMSG group, the percentage of the ovulated gilts was 0% on day 0 and day 1, and 60.0% on day 2, 83.3% on day 3, 100% on day 4 and day 5. In PMSG-hCG group, the percentage of the ovulated gilts was 0% on day 0 and day 1, and 100% on day 2 to day 5. The ovulation rates on day 2 were 85.6% in PMSG group and 94.5% in PMSG-hCG group. The ovulation rates were more than 90% on day 3, day 4 and day 5 in both groups. The number of ovulated follicles was almost the same on day 2 in both groups and was smaller in PMSG group than in PMSG-hCG group on day 3, day 4 and day 5.<br>From the results of the present study, PMSG-hCG injection was more effective in the induction of ovulation than single PMSG injection. Also, the present study suggests that the ovulation occurs on day 2 after hCG injection.

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