caa a22 4500 388059974 CHVBK 20180307125117.0 cr unu---uuuuu 161130e199812 xx s 000 0 eng 10.1017/S1357729800032781 doi S1357729800032781 pii (NATIONALLICENCE)cambridge-10.1017/S1357729800032781 Influence of calving season on the interactions among reproductive disorders of dairy cows [Elektronische Daten] The objective of this study was to evaluate the influence of calving season on the interactions among reproductive disorders prior to conception and their effect on subsequent reproductive performance in dairy cows. Data from 3170 lactations of Holstein-Friesian cows that subsequently conceived were analysed by means of path analysis techniques. The cows were from nine commercial dairy herds in north-eastern Spain. Lactation incidence rates for retained placenta, metritis, ovarian cysts and repeat breeding (more than four artificial inseminations per conception) were 6·4, 3·7, 5·4 and 7·9%, respectively, and there were no differences between warm (May to September) and cool (October to April) calving seasons. However, our data show that calving season influenced the interrelationships among reproductive traits. Lactation number was not related to any of the path model variables for cows calving in cool seasons and retained placenta did not directly influence ovarian cysts or repeat breeding. In contrast, older cows that calved during warm seasons showed an increased risk of experiencing retained placenta, ovarian cysts and more days open; retained placenta was a direct risk factor for ovarian cysts and repeat breeding. Our data indicated that a cool season decreased interactions among reproductive disorders of dairy cows. Cows that calved in a cool environment could more effectively cope with reproductive disorders prior to conception and this fact was mainly observed in older cows. Copyright © British Society of Animal Science 1998 calving nationallicence dairy cows nationallicence path analysis nationallicence reproductive disorders nationallicence seasonal variation nationallicence Labernia J. Departament de Producció Animal, Universitat de Lleida, Rovira Roure 177, 25198 Lleida, Spain Lopez-Gatius F. Departament de Producció Animal, Universitat de Lleida, Rovira Roure 177, 25198 Lleida, Spain Santolaria P. Departament de Producció Animal, Universitat de Lleida, Rovira Roure 177, 25198 Lleida, Spain Hanzen C. Service d‘Obstétrique et des Troubles de la Reproduction, Université de Liège, Faculté de Médecine Vétérinaire, B41 Sart Tilman, B-4000 Liège, Belgium Laurent Y. Departament de Producció Animal, Universitat de Lleida, Rovira Roure 177, 25198 Lleida, Spain Houtain J. Y. Service d‘Obstétrique et des Troubles de la Reproduction, Université de Liège, Faculté de Médecine Vétérinaire, B41 Sart Tilman, B-4000 Liège, Belgium Animal Science Cambridge University Press 67/3(1998-12), 387-393 1357-7298 67:3<387 1998 67 ASC https://doi.org/10.1017/S1357729800032781 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S1357729800032781 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Labernia J. Departament de Producció Animal, Universitat de Lleida, Rovira Roure 177, 25198 Lleida, Spain NATIONALLICENCE 700 1- Lopez-Gatius F. Departament de Producció Animal, Universitat de Lleida, Rovira Roure 177, 25198 Lleida, Spain NATIONALLICENCE 700 1- Santolaria P. Departament de Producció Animal, Universitat de Lleida, Rovira Roure 177, 25198 Lleida, Spain NATIONALLICENCE 700 1- Hanzen C. Service d‘Obstétrique et des Troubles de la Reproduction, Université de Liège, Faculté de Médecine Vétérinaire, B41 Sart Tilman, B-4000 Liège, Belgium NATIONALLICENCE 700 1- Laurent Y. Departament de Producció Animal, Universitat de Lleida, Rovira Roure 177, 25198 Lleida, Spain NATIONALLICENCE 700 1- Houtain J. Y. Service d‘Obstétrique et des Troubles de la Reproduction, Université de Liège, Faculté de Médecine Vétérinaire, B41 Sart Tilman, B-4000 Liège, Belgium NATIONALLICENCE 773 0- Animal Science Cambridge University Press 67/3(1998-12), 387-393 1357-7298 67:3<387 1998 67 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge