Papers

Peer-reviewed
2012

Relation of reproductive performances and rectal palpation for luteum function of heifers 7 days after estrus

ANIMAL SCIENCE JOURNAL
  • Tatsuyuki Yoshida
  • ,
  • Makoto Seki
  • ,
  • Norio Watanabe
  • ,
  • Hiroki Furuta
  • ,
  • Itaru Yoshimura
  • ,
  • Masahiro Osada
  • ,
  • Koji Chiba
  • ,
  • Konosuke Okada
  • ,
  • Koh Kawasumi
  • ,
  • Hitoshi Ushijima

Volume
83
Number
3
First page
207
Last page
212
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.1111/j.1740-0929.2011.00935.x
Publisher
WILEY-BLACKWELL

Diagnosis of corpus luteum (CL) function by rectal palpation (RP) has been widely used for recipient selection of embryo transfer (ET), a technology essential for genetic improvements in cattle. To examine the accuracy of RP diagnosis method, the relationship between RP-based CL function and reproductive performance was compared in this study. In Experiment 1, CL of Holstein heifers on day 7 after estrus was classified into functional or hypoplastic by RP, and the results were compared with ultrasonographic (US) images and plasma progesterone (P4) levels. As a result, heifers with functional CL judged by RP had a mean maximum CL diameter of 20.1 +/- 3.1 mm on US and a mean P4 concentration of 8.1 +/- 2.3 ng/mL. These values were significantly greater than those of heifers with hypoplastic CL (12.4 +/- 5.4 mm, 4.0 +/- 2.8 ng/mL) (P < 0.001). In Experiment 2, the length of the estrus cycle was examined between functional CL and hypoplastic CL. The rate of heifers with a normal estrus cycle length with 1825 days was significantly lower with hypoplastic CL than with functional CL (16/24 vs. 43/46, P < 0.01). In Experiment 3, 543 inseminated heifers were similarly classified by CL function by RP 7 days after estrus. The heifers with functional CL showed higher pregnancy rate compared with the heifers with hypoplastic CL (75.2 vs. 47.9%, P < 0.0001). Finally, the CL function of 66 heifers was examined by RP on day 7 post-estrus, and ET was performed in 49 (74.2%) heifers with functional CL. As a result, 27 (55.1%) of them became pregnant. Taken together, these results reconfirm that RP on day 7 after estrus is useful for selection of heifers with functional CL.

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Link information
DOI
https://doi.org/10.1111/j.1740-0929.2011.00935.x
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000301773500004&DestApp=WOS_CPL

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