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Incidence of Infertility in Dairy Cows

Infertilitetsfrekvensen hos ko

Acta Veterinaria Scandinavica volume 19, pages 354–367 (1978)Cite this article

Abstract

The incidence of anoestrus, suboestrus, delayed ovulation, cystic ovaries, repeat breeder cows, endometritis and other forms of infertility was studied in 283 herds over a period of eight years (2,304 cases). The total incidence of infertility (0.111 cases per cow per year) varied significantly from year to year. The peak of the seasonal variation occurred in December-April and did not correspond with the seasonal variation in calving. Both the size of herd and the type of housing affected the incidence of infertility, but the differences were great in respect of the various diagnoses. The incidence of ketosis by herd correlated significantly with the incidence of infertility by herd.

Sammanfattning

Förekomsten av olika former av infertilitet har undersökts i 283 besättningar under åren 1968–1975. Besättningarnas ko-antal har år-ligen i medeltal varit 2.590. Följande faktorer har tagits i betraktande: variationen per år, per säsong och dess förhållande till kalvningarnas säsongvariation och sjukdomsfrekvensen samt besättningarnas storlek, ladugårdstypens och kontrollverksamhetstillhörighetens inverkan på densamma.

I materialet, som omfattade 2.304 fall av infertilitet (0,111 fall/ ko/år), konstaterades, att frekvensen varierade signifikant mellan år. Säsongvariationen avvek från kalvningarnas variation såtillvida, att majoriteten av fallen förekom under tiden december-april. Frekvensen av anoestrus och suboestrus (0,015 resp. 0,023) varierade signifikant mellan år och avvek från kalvningarnas säsongvariation. Frekvensen påverkades inte av besättningens storlek, men var högre i besättningar underkastade kontroll. Frekvensen av fördröjd ovulation (0,006) varierade från år till år. Frekvensen av symptomfri omlöpning (0,009) uppvisade ingen årsvariation. Frekvensen av äggstockscystor (0,041) varierade årligen och var signifikant större under perioden december-mars. Endometrit-frekvensen (0,014) syntes vara beroende av be-sättningen storlek och ladugårdstypen.

Såväl besättningens storlek som typen av ladugård syntes påverka infertilitetsfrekvensen, men skillnaderna visavis infertilitetstyperna var stora. Infertilitetsfrekvensen/besättning stod i signifikant korrelation till ketosfrekvensen (r = 0,15, Ρ < 0,001).

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Authors and Affiliations

  1. Department of Obstetrics and Gynaecology and, the Ambulatory Clinic, SF-04840, Hautjärvi, Finland

    K. Roine & H. Saloniemi

  2. Department of Animal Hygiene, Helsinki, College of Veterinary Medicine, Finland

    K. Roine & H. Saloniemi

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  1. K. Roine
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  2. H. Saloniemi
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Roine, K., Saloniemi, H. Incidence of Infertility in Dairy Cows. Acta Vet Scand 19, 354–367 (1978). https://doi.org/10.1186/BF03547605

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Acta Veterinaria Scandinavica

ISSN: 1751-0147