[en] Between days 27 and 59 after artificial insemination (AI),189 ultrasonographic pregnancy diagnoses were made in 56 dairy cows using a 7·5 MHz linear-array rectal transducer. Blood samples were withdrawn from a jugular vein on the day of AI, on day 21, and after each ultrasonographic examination between days 27 and 31, days 34 and 38, days 41 and 45 and days 55 and 59 after AI. Plasma concentrations of bovine pregnancy-associated glycoprotein 1 (bPAG-1) were measured by radioimmunoassay. The results showed that before day 31, ultrasonographic scanning was not very sensitive because six of the 30 calving cows were incorrectly diagnosed as non-pregnant. In five of these animals, the uterus was located far cranial to the pelvic inlet. Five of the cows examined between days 27 and 31 were pregnant on the basis of plasma bPAG-1 levels on the same day, using 0·5 ng/ml as the cut-off point. Plasma levels of bPAG-1 and progesterone proved that four of the cows which had early positive ultrasonographic diagnoses but did not produce a calf, were pregnant when they were examined.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Szenci, Otto; University of Veterinry Science, Budapest, Hungary > Dept of Obstetrics and Reproduction
Taverne, M. A. M.; University of Utrecht, Utrecht, The Netherlands > Dept of Herd Health and Reproduction
Beckers, Jean-François ; Université de Liège - ULiège > Département de sciences fonctionnelles > Physiologie de la reproduction
Sulon, Joseph ; Université de Liège - ULiège > Département de sciences fonctionnelles > Physiologie de la reproduction
Varga, J.; University of Veterinary Science, Budapest, Hungary > Dept of Obstetrics and Reproduction
Bözsönyi, L.; University of Veterinary Science, Budapest, Hungary > Dept of Obstetrics and Reproduction
Hanzen, Christian ; Université de Liège - ULiège > Département clinique des animaux de production (DCP) > Obstétr. et path. de la reprod. des équidés, rumin. et porcs
Schekk, Gy; University of Veterinary Science, Budapest, Hungary > Dept of Obstetrics and Reproduction
Language :
English
Title :
Evaluation of false ultrasonographic pregnancy diagnoses in cows by measuring plasma levels of bovine pregnancy-associated glycoprotein 1 (bPAG1).
Publication date :
1998
Journal title :
Veterinary Record
ISSN :
0042-4900
eISSN :
2042-7670
Publisher :
British Veterinary Medicine, London, United Kingdom
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