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Effect of oestradiol benzoate, progesterone and vaginal bolt on superovulation of Holstein heifers

Published online by Cambridge University Press:  02 August 2007

Duan Bao-Ning ,
Xue Jian-Hua ,
Zhang Xin-Hui ,
Wu Sheng-Quan ,
Sun Feng-Jun  and
Sang Run-Zi
Duan Bao-Ning
Affiliation:
The Research Centre of Cattle and Sheep Embryonic Technique of Hebei, College of Animal Science and Technology, Agriculture University of Hebei, Baoding 071001, China
Xue Jian-Hua
Affiliation:
The Embryo Department of Beijing Dairy Cattle Center, Beijing 102100, China
Zhang Xin-Hui
Affiliation:
The Embryo Department of Beijing Dairy Cattle Center, Beijing 102100, China
Wu Sheng-Quan
Affiliation:
The Embryo Department of Beijing Dairy Cattle Center, Beijing 102100, China
Sun Feng-Jun
Affiliation:
The Embryo Department of Beijing Dairy Cattle Center, Beijing 102100, China
Sang Run-Zi*
Affiliation:
The Research Centre of Cattle and Sheep Embryonic Technique of Hebei, College of Animal Science and Technology, Agriculture University of Hebei, Baoding 071001, China
*
*Correspoding author. E-mail: rzsang@yahoo.com.cn
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Abstract

This trial was aimed at investigating the effect of different doses of progesterone (P4) and types of vaginal bolts on new follicular wave induction, oestrus synchronization and superovulation in Holstein heifers. Results showed that the interval after prostaglandin F2α (PGF2α) application and oestrus occurrence between the sponge blot (SP) group (48.3 h) and the progestin release device (PRD) group (39 h) was significantly different (P<0.05). The average number of embryos obtained in the SP group (13.2) was significantly higher than that (8.7) in the PRD group (P<0.05). The same trend was observed for the number of usable embryos (5.7 and 3.3 for SP and PRD groups, respectively). The injection of 50 and 100 mg of P4 efficiently induced a new follicular wave, whereas no significant difference (P>0.05) was recorded on oestrus synchronization and superovulation between the two groups.

Keywords

oestradiol benzoateprogesteronevaginal boltsuperovulation
Type
Research Article
Information
Chinese Journal of Agricultural Biotechnology , Volume 4 , Issue 2 , August 2007 , pp. 117 - 120
Copyright
Copyright © China Agricultural University and Cambridge University Press 2007

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Footnotes

First published in Journal of Agricultural Biotechnology 2006, 14(6): 861–864

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