| Ovarian activity in beef and dairy cows with prolonged postpartum period and heifers that fail to conceive. | |
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MedLine Citation:
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PMID: 19809886 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The primary objectives of this study were to investigate incidence of abnormal ovarian cyclicity (AOC) and its type in dairy and beef cows with prolonged postpartum period (>90 days) and in heifers that fail to conceive. A total of 53 animals were included in the study: 17 Friesian crosses, 16 Braford crosses, eight Brangus crosses, and 12 local Kedah-Kelantan (KKX) crosses. These animals were initially checked for absence of pregnancy via palpation per rectum. Blood samples for progesterone analysis were obtained twice a week for 2 to 3 months following their spontaneous oestrous cycle, and all animals were rechecked for pregnancy at the end of the study. Progesterone analysis indicated that 33.9% of the total animals were having AOC: 18.9% with cessation of ovarian cyclicity, 9.4% with prolonged luteal phases (PLP), and 5.7% short luteal phases. The highest incidence was observed in Brangus crosses (62.5%), followed by Braford crosses (43.8%), and Friesian crosses (35.3%). In contrast, no AOC was observed in the local KKX breeds, and all of them were found to be pregnant at the end of the study. A significant difference (p < 0.05) in the incidence of AOC and its type was observed between Kedah-Kelantan crosses and the other breeds. Although not significant (p > 0.05), Friesian crosses showed a higher percentage incidence of AOC than beef cows (40% vs 36.4%), with major types being PLP (26.7%) in dairy and cessation of ovarian cycle (27.3%) in beef cows. Compared with beef heifers, beef cows showed a higher percentage of AOC (36.4% vs 28.6%) where again, cessation of cyclicity was the predominant abnormality. In conclusion, AOC reflected by abnormal endocrine pattern is a possible cause of reduction in fertility for dairy and beef cows beyond 90 days postpartum and heifers that fail to conceive. |
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Authors:
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N Yimer; Y Rosnina; H Wahid; A A Saharee; K C Yap; P Ganesamurthi |
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Publication Detail:
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Type: Journal Article Date: 2009-10-08 |
Journal Detail:
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Title: Tropical animal health and production Volume: 42 ISSN: 1573-7438 ISO Abbreviation: Trop Anim Health Prod Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-09 Completed Date: 2010-06-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 1277355 Medline TA: Trop Anim Health Prod Country: United States |
Other Details:
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Languages: eng Pagination: 607-15 Citation Subset: IM |
Affiliation:
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Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cattle / physiology* Estrous Cycle / physiology* Female Male Ovary / physiology* Postpartum Period Pregnancy Progesterone / blood Statistics, Nonparametric |
| Chemical | |
Reg. No./Substance:
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57-83-0/Progesterone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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