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The objective of the studies was to determine the level of spermagglutinin in blood sera of cows of multiple ineffective inseminations. The studies were performed on 219 cows and 12 heifers of the black-and-white breed. The titre of spermagglutinins was checked by the use of the Deo and Roy the microagglutination test. The titre of agglutinins was defined as a lowest blood dilution in which agglutination...
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