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The Pregnancy-Associated Glycoproteins and their Importance in Monitoring the Progress of Bovine Pregnancy J. F. Beckers1, N. M. Sousa1, O. Szenci2, M. Taverne3, B. Van der Weiden3 1Belgium, 2Hungary, 3The Netherlands

302	Comparison of Ultrasound and Rectal Palpation Pregnancy Diagnosis Techniques in Israeli Dairy Herds I. Waksman, O. Nir, N. Galon Israel

303	Resynchronization and Early Pregnancy Detection may Enhance Reproductive Performance of Lactating Dairy Cows A. Niasari-Naslaji, M. Bolourchi, S. Shabani, D. Nikjou, A. Moghiseh Iran

304	Accuracy of Corpus Luteum Detection by Palpation and Ultrasonography per Rectum and Optimization of Accuracy of Ultrasonography R. Bicalho, K. Galvao, C. Guard, J. Santos United States

305	Suitability of Colour Doppler Sonography for Evaluation of Plasma Progesterone Levels in Cyclic Holstein Frisian Cows K. Herzog, C. Voss, N. Beindorff, V. Paul, H. Meyer, H. Niemann, H. Bollwein Germany