| Luteal blood flow is a more appropriate indicator for luteal function during the bovine estrous cycle than luteal size. | |
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MedLine Citation:
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PMID: 20071016 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The objective of this study was to assess the reliability of luteal blood flow (LBF) as recorded by color Doppler sonography to monitor luteal function during the estrous cycle of dairy cows and to compare the results with that for the established criterion luteal size (LS) as determined by B-mode sonography. In total, 14 consecutive sonographic examinations were carried out in 10 synchronized lactating Holstein-Friesian cows (Bos taurus) on Days 4, 5, 6, 7, 8, 10, 12, 14, 16, -5, -4, -3, -2, -1 of the estrous cycle (Day 1=ovulation). Plasma progesterone concentrations in venous blood (P(4)) were quantified by enzyme immunoassay. Luteal size was determined by sonographic measurement of the maximal cross-sectional area of the corpus luteum (CL). Luteal blood supply was estimated by calculating the maximum colored area of the CL from power Doppler sonographic images. Luteal size doubled during the luteal growth phase (until Day 7) and remained at this level during the luteal static phase (Day 8 to 16) before decreasing rather slowly during luteal regression (Days -5 to -1). Luteal blood flow doubled during the growth phase, doubled furthermore during the static phase, and decreased rapidly during luteal regression. Thus, LBF values represented highly reliable predictors of luteal status. Luteal blood flow predicted reliably a P(4)>1.0 ng/mL by reaching only 35% of the maximal values, whereas LS had to exceed 60% of the maximal values to indicate reliably a functional CL. It is concluded that LBF reflected luteal function better than LS specifically during luteal regression. |
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Authors:
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K Herzog; M Brockhan-L?demann; M Kaske; N Beindorff; V Paul; H Niemann; H Bollwein |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Journal Article Date: 2010-01-13 |
Journal Detail:
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Title: Theriogenology Volume: 73 ISSN: 1879-3231 ISO Abbreviation: Theriogenology Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-02-17 Completed Date: 2010-05-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0421510 Medline TA: Theriogenology Country: United States |
Other Details:
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Languages: eng Pagination: 691-7 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier Inc. All rights reserved. |
Affiliation:
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Clinic for Cattle, University of Veterinary Medicine Hannover, Hannover, Germany. kathrin.herzog@tiho-hannover.de |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Biological Markers / analysis, blood Cattle Corpus Luteum / anatomy & histology*, blood supply*, physiology*, ultrasonography Diagnostic Techniques, Obstetrical and Gynecological / veterinary Estrous Cycle / blood, physiology* Estrus Synchronization / methods, physiology Female Luteinization / blood, physiology Luteolysis / blood, physiology Organ Size / physiology Progesterone / blood Regional Blood Flow / physiology* Sensitivity and Specificity Ultrasonography, Doppler, Color / methods, veterinary |
| Chemical | |
Reg. No./Substance:
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0/Biological Markers; 57-83-0/Progesterone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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