Induction of Accessory Corpus luteum by Gonadorelin in Relation to the Time of Treatment and the Follicle Size in Inseminated Cows

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62157124%3A16170%2F17%3A43876145" target="_blank" >RIV/62157124:16170/17:43876145 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.17221/46/2016-CJAS" target="_blank" >http://dx.doi.org/10.17221/46/2016-CJAS</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17221/46/2016-CJAS" target="_blank" >10.17221/46/2016-CJAS</a>

Result language

angličtina

Original language name

Induction of Accessory Corpus luteum by Gonadorelin in Relation to the Time of Treatment and the Follicle Size in Inseminated Cows

Original language description

This study evaluated the occurrence of two corpora lutea (CL) and the pregnancy rate in cows treated with gonadorelin on days 5, 6 or 7 after insemination in relation to the day of treatment and the size of the largest follicle on the ovaries at the time of treatment. Cows bearing one CL on days 5 (n = 40), 6 (n = 48), and 7(n = 47) after insemination with defined size of the largest follicle on the ovaries (small = 9 mm, n = 34; medium 10-14 mm, n = 59; large 15-20 mm, n = 42) were included in the study. Gonadorelin was administered after examination (day 0) and ultrasonographic examination was repeated on days 14, 28, and around day 90. The occurrence of 2 CL vs 1 CL was higher in pregnant cows on day 14 as well as on day 28 (86 vs 14% and 82.5 vs 14%, n = 57). Pregnancy rates on day 28 and around day 90 were higher in cows bearing 2 CL (n = 57) vs cows bearing 1 CL (n = 54) (82.5 vs 18.5% and 79.0 vs 18.5%, P &lt; 0.001). The occurrence of 2 CL on day 28 was higher in cows treated on day 5 compared to cows treated on day 6 or 7 after insemination (60.0 vs 33.3 or 36.2%, P &lt; 0.05). No significant differences in the number of CL and pregnancy rate were found in relation to follicle size at the time of treatment. Our results showed the higher efficiency of accessory CL induction by gonadorelin administration in cows treated on day 5 vs those treated on day 6 or 7 post insemination, however efficiency of the treatment was not influenced by the size of the largest follicle on the ovaries.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10604 - Reproductive biology (medical aspects to be 3)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Czech Journal of Animal Science

ISSN

1212-1819

e-ISSN

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Volume of the periodical

62

Issue of the periodical within the volume

5

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

6

Pages from-to

195-200

UT code for WoS article

000400338300002

EID of the result in the Scopus database

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