Repository of University of Nova Gorica

Show document
A+ | A- | Help | SLO | ENG

Title:Luteal activity and effect of dietary energy restriction on follicular development in lactating cows
Authors:ID Comin, Antonella, Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy (Author)
ID Peric, Tanja, Center for Biomedical Science and Engineering, University of Nova Gorica, Nova Gorica, Slovenia (Author)
ID Montillo, M., Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy (Author)
ID Cappa, Alberto, Evoluzione S.r.l., Sossano (VI), Italy (Author)
ID Marchi, Vittorio, DVM, Cremona, Italy (Author)
ID Veronesi, Maria Cristina, Department of Veterinary Medicine, University of Milano, Milano, Italy (Author)
ID Prandi, Alberto, Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy (Author)
Files: This document has no files that are freely available to the public. This document may have a physical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:The aim of this research has been to evaluate the presence of anomalies in the ovarian cycle activity during postpartum and to verify whether 72-hr dietary fasting during the dominance phase, the phase before ovulation, might modify the ovarian follicle population. The presence of anomalies in ovarian cycle activity has been evaluated in 30 Italian Friesian cows starting from 20 days postpartum until 211 days of lactation. Long oestrus and brief dioestrus or scarce luteal activity have been the main anomalies found through measuring progesterone concentrations in the whey. Until 100 days of lactation, the BCS values of the problematic animals have been significantly lower than those in animals with normal ovarian activity. After 100 days of lactation, the ovarian anomalies continued to appear despite the fact that all the animals have reached comparable BCS values. Starting from the results of this trial, the effect of 72-hr dietary fasting on dominant follicles has been studied in six cows. Ultrasonography revealed that the diameter of the follicles at 71 days postpartum has been significantly lower than at 181 days. A 72-hr dietary restriction at 101 and 211 days postpartum did not affect the size of the dominant follicle. However, at 101 days postpartum, half of the animals presented follicular cysts. The effect of fasting differed if the animal has been in early postpartum or 211 days of lactation. Further researches are necessary to understand how different metabolic conditions can modify the follicular population but on the other hand the study shows the utility for farmers and field veterinarians of monitoring the resumption of the ovarian cycle postpartum through the whey progesterone concentrations.
Keywords:dairy cow, cyclic activity, follicles, fasting
Publication version:Author Accepted Manuscript
Year of publishing:2017
Number of pages:1-7
PID:20.500.12556/RUNG-3052-d4f5d104-871d-ed09-d50a-0ee22941033f New window
COBISS.SI-ID:4764411 New window
DOI:DOI: 10.1111/rda.12959 New window
Publication date in RUNG:06.04.2017
Copy citation
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:Bookmark and Share

Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Record is a part of a journal

Title:Reproduction in Domestic Animals
Publisher:Wiley: 12 months
Year of publishing:2017


License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:06.04.2017