Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12188/21413
DC Field | Value | Language |
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dc.contributor.author | Atanasov, Branko | en_US |
dc.contributor.author | Adamov, Nikola | en_US |
dc.contributor.author | Celeska, Irena | en_US |
dc.contributor.author | Ilievska, Ksenija | en_US |
dc.contributor.author | Angjelovski, Branko | en_US |
dc.contributor.author | Trbogazov, Zvonko | en_US |
dc.contributor.author | Davkov, Filip | en_US |
dc.contributor.author | Dovenski, Toni | en_US |
dc.contributor.author | Opsomer, Geert | en_US |
dc.contributor.author | Stevenson, Jeffrey | en_US |
dc.date.accessioned | 2022-07-21T09:16:33Z | - |
dc.date.available | 2022-07-21T09:16:33Z | - |
dc.date.issued | 2020-10-01 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12188/21413 | - |
dc.description.abstract | <jats:title>Abstract</jats:title> <jats:p>We hypothesized that a single dose of PGF<jats:sub>2α</jats:sub> belatedly injected on day 8 after GnRH-1 in cows receiving a 7-day Ovsynch-56 protocol (GnRH – 7 days – PGF<jats:sub>2α</jats:sub> – 56h – GnRH – 16h – timed AI) will increase the proportion of cows with complete luteolysis. At day 35±3 postpartum, 70 lactating Holstein cows from one herd were scored for body condition and pre-synchronized with PGF<jats:sub>2α</jats:sub> and GnRH (3 days apart) and 7 days later submitted to an Ovsynch-56 protocol for first AI after random assignment to two treatments: (1) OV-7 (n=35) with an injection of PGF<jats:sub>2α</jats:sub> either on day 7; or (2) OV-8 (n=35) on day 8 after G1, respectively. Blood was collected before the first PGF<jats:sub>2α</jats:sub>, at day 7 and day 8 in OV-7 and OV-8, respectively, at AI and at 7 days after AI to assess progesterone concentration. Ten cows were classified as acyclic and were excluded from the analysis resulting in 60 cows (OV-8, n=27; OV-7, n=33). In total, more (P=0.01) OV-8 cows and more (P=0.04) primiparous OV-8 cows had complete luteolysis compared with their OV-7 herd mates. In addition, more (P=0.008) OV-8 cows with BCS<2.75 had complete luteolysis compared with their OV-7 herd mates, whereas no difference was observed between treatments among cows with BCS ≥2.75. In conclusion, delaying the application of PGF<jats:sub>2α</jats:sub> by 1 day reduced the percentage of primiparous cows and cows with poorer BCS having incomplete luteal regression at the time of AI.</jats:p> | en_US |
dc.publisher | Walter de Gruyter GmbH | en_US |
dc.relation.ispartof | Macedonian Veterinary Review | en_US |
dc.title | Modification of the Standard 7-Day Ovsynch Protocol to Increase the Luteolytic and Synchronization Risks in Dairy Cows | en_US |
dc.identifier.doi | 10.2478/macvetrev-2020-0028 | - |
dc.identifier.url | https://content.sciendo.com/view/journals/macvetrev/43/2/article-p161.xml | - |
dc.identifier.url | https://www.sciendo.com/pdf/10.2478/macvetrev-2020-0028 | - |
dc.identifier.volume | 43 | - |
dc.identifier.issue | 2 | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Faculty of Veterinary Medicine | - |
crisitem.author.dept | Faculty of Veterinary Medicine | - |
crisitem.author.dept | Faculty of Veterinary Medicine | - |
crisitem.author.dept | Faculty of Veterinary Medicine | - |
crisitem.author.dept | Faculty of Veterinary Medicine | - |
Appears in Collections: | Faculty of Veterinary Medicine: Journal Articles |
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02. macvetrev-2020-0028-1.pdf | 332.98 kB | Adobe PDF | View/Open |
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