Straty ciążowe w okresie zarodkowym u bydła

Anna Świątek , Adam Okólski

Abstract

The aim of this paper was to present the problem of early pregnancy losses in cows, an important problem in cattle obstetrics. Embryo mortality significantly reduces the animals fertility. This problem affects all species of livestock. The percentage of embryonic losses varies in livestock: in pigs reaches 30–50%, in sheep 20–30%, in horses 15–24% and in cattle can be as high as 45–65%. This biological problem strongly influences the economy of milk production. Relatively not many embryos die before 8th day after insemination. It is estimated that 70–80% of all embryo mortality cases takes place between 8 and 16 days of gestation. Embryonic death is a result of complex process influenced by many factors. They include condition, milk yield and hormonal profile of cow, the quality of gametes as well as the synchronization between mother and embryo and also existing genetic and immunologic defects. It is difficult to determine embryonic death in cows under field conditions. The problem of early losses of pregnancy is a consequence of breeding program oriented on the increase of cattle productivity and it can’t be easily solved.
Author Anna Świątek (FoAS / DoARaA)
Anna Świątek,,
- Department of Animal Reproduction and Anatomy
, Adam Okólski (FoAS / DoARaA)
Adam Okólski,,
- Department of Animal Reproduction and Anatomy
Other language title versionsEarly pregnancy losses during embryonic period in cattle
Journal seriesŻycie Weterynaryjne, ISSN 0137-6810, [1689-0299], (B 4 pkt)
Issue year2012
No87(3)
Pages197-200
Publication size in sheets0.5
Keywords in Englishembryonic death, gestation, cows.
Languagepl polski
Score (nominal)4
Score sourcejournalList
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