This study was partly supported by the Hungarian Research Fund, Grant Number: OTKA T016901. We gratefully thank N Jeanguyot and S Germain (UNCEIA, Maisons-Alfort, France) for their technical assistance in bPSPB assays and A.V.D. Pol (Utrecht, The Netherlands) with the P4 assay. The Belgian part of the study was supported by grants from IRSIA and FNRS.
ALEXANDER B. M., JOHNSON M. S., GUARDIA R. O., VAN DE GRAF W. L., SENGER P. L., SASSER R. G. Embryonic loss from 30 to 60 days post breeding and the effect of palpation per rectum on pregnancy. Theriogenology. 43:1995;551-556.
CHAFFAUX S., REDDY G. N. S., VALON F., THIBIER M. Transrectal real-time ultrasound scanning for diagnosing pregnancy and for monitoring EM in dairy cattle. Animal Reproduction Science. 10:1986;193-200.
DIELEMAN S. J., BEVERS M. M. Effects of monoclonal antibody against PMSG administered shortly after the preovulatory LH surge on time and number of ovulations in PMSG/PG-treated cows. Journal of Reproduction and Fertility. 81:1987;533-542.
HANZEN C., LAURENT Y. Application de l'echographie bidimensionnelle au diagnostic de gestation et - l'evaluation de l'incidence de la mortalite-embryonnaire dans l'espece bovine. Annales Médecine Véterinaire. 134:1991;481-487.
HUMBLOT P., CAMOUS S., MARTAL J. Pregnancy specific protein B, progesterone concentrations and EM during early pregnancy in dairy cows. Journal of Reproduction and Fertility. 83:1988a;215-223.
HUMBLOT P., CAMOUS S., MARTAL J. Diagnosis of pregnancy by radioimmunoassay of a pregnancy-specific protein in the plasma of dairy cows. Theriogenology. 30:1988b;257-267.
HUMBLOT P. Signaux embryonnaires et controle de la gestation des ruminants. Recueil de Médecine Véterinarie. 167:1991;193-202.
MIALON M. M., CAMOUS S., RENAND G., MARTAL J., MENISSIER F. Peripheral concentrations of a 60 KD pregnancy serum protein during gestation and after calving and in relationship to EM in cattle. Reproduction Nutrition Development. 33:1993;269-282.
SASSER R. G., RUDER C. A., IVANI K. A., BUTLER J. E., HAMILTON W. C. Detection of pregnancy by radioimmunoassay of a novel pregnancy-specific protein in serum of cows and a profile of serum concentrations during gestation. Biology of Reproduction. 35:1986;936-942.
SEMAMBO D. K. N., AYLIFFE T. R., BOYD J. S., TAYLOR D. J. Early abortion in cattle induced by experimental intrauterine infection with pure cultures of Actinomyces pyogenes. The Veterinary Record. 131:1992a;7-12.
SEMAMBO D. K. N., ECKERSALL P. D., SASSER R. G., AYLIFFE T. R. Pregnancy-specific protein B and progesterone in monitoring viability of the embryo in early pregnancy in the cow after experimental infection with Actinomyces pyogenes. Theriogenology. 37:1992b;741-748.
SZENCI O., TAVERNE M. A. M., BECKERS J. F. Evaluation of false ultrasonographic diagnoses in cows measuring plasma levels of bovine pregnancy associated glycoprotein (bPAG). The Veterinary Record. 142:1998a;304-306.
SZENCI O., BECKERS J. F., HUMBLOT P. Comparison of ultrasonography, bovine pregnancy specific protein B, and bovine pregnancy associated glycoprotein 1 test for pregnancy in dairy cows. Theriogenology. 50:1998b;77-88.
ZOLI A. P., GUILBAULT L. A., DELAHAUT P., BENITEZ-ORTIZ W., BECKERS J. F. Radioimmunoassay of a bovine pregnancy-associated glycoprotein in serum: its application for pregnancy diagnosis. Biology of Reproduction. 46:1992;83-92.