| Comparison in effect of Heatsynch with heat detection aids and CIDR-Heatsynch in dairy heifers. | |
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MedLine Citation:
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PMID: 20586954 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The objective of the present study was to determine whether oestrous detection with the help of oestrous detection aids during the Heatsynch without timed AI protocol is equally effective with the progesterone-combined protocol in dairy heifers. A total of 148 heifers were randomly assigned to one of the two groups. A group of heifers treated with Heatsynch with heat detection aids (n = 72) received GnRH on day 0, prostaglandin F(2alpha) (PGF(2alpha)) on day 7 and oestradiol benzoate (EB) on day 8, while in controlled internal drug release (CIDR)-Heatsynch group (n = 76), CIDR was included during a period from GnRH to PGF(2alpha). Heifers were checked for oestrus twice daily, i.e. from 09:00 to 10:00 hours and from 15:00 to 16:00 hours starting on day 2 for Heatsynch group and on day 8 in CIDR-Heatsynch group, and continued up to day 12. KAMAR heat mount detector (KAMAR Inc., Steamboat Springs, CO, USA) and ALL-WEATHER PAINTSTIK (LA-CO Industries Inc., Elk Grove Village, IL, USA) were used as heat detection aids. AI was conducted within 1 h after confirming oestrus in 72 heifers, while 19 animals were transferred with embryo 7 days after oestrus according to the request of the owners. Premature oestrus before PGF(2alpha) injection occurred in 18% of Heatsynch group. Of 13 heifers which showed premature oestrus, six were inseminated and two of them conceived. Oestrus detection rate within 12 days after initiation of the protocols did not differ between the two groups (94% vs 95%). There was no difference in the conception rate after first AI (including heifers that were inseminated before PGF(2alpha) injection) and embryo transfer between Heatsynch with heat detection aids and CIDR-Heatsynch groups (36% vs 44% and 70% vs 56%). It is concluded that the use of heat detection aids to monitor the occurrence of premature oestrus prior to PGF(2alpha) injection in Heatsynch protocol in dairy heifers was equally effective to the inclusion of CIDR. |
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Authors:
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M Yusuf; T Nakao; C Yoshida; S T Long; S Fujita; Y Inayoshi; T Furuya |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Reproduction in domestic animals = Zuchthygiene Volume: 45 ISSN: 1439-0531 ISO Abbreviation: Reprod. Domest. Anim. Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-06-30 Completed Date: 2010-09-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9015668 Medline TA: Reprod Domest Anim Country: Germany |
Other Details:
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Languages: eng Pagination: 500-4 Citation Subset: IM |
Affiliation:
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Department of Veterinary Medicine, Faculty of Agriculture, Yamaguchi University, Yoshida, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cattle / physiology* Dinoprost / administration & dosage Embryo Transfer / veterinary Estradiol / administration & dosage, analogs & derivatives Estrus Detection / instrumentation, methods* Estrus Synchronization / methods* Female Gonadotropin-Releasing Hormone / administration & dosage Hot Temperature Insemination, Artificial / methods, veterinary Pregnancy Progesterone / blood Progestins / administration & dosage |
| Chemical | |
Reg. No./Substance:
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0/Progestins; 33515-09-2/Gonadotropin-Releasing Hormone; 50-28-2/Estradiol; 50-50-0/estradiol 3-benzoate; 551-11-1/Dinoprost; 57-83-0/Progesterone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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