The effect of bovine placenta extract application on the postnatal complications, insemination efficiency and milk yield of the first lactation period Russian Black Pied cows

摘要

The procedure for prevention and treatment of the postnatal complications based on application of tissue extract produced from bovine placenta has been developed.Introduction The maintenance of reproduction performance of dairy cows has a great importance in modern milk production (Remppis et al., 2011). In Russia, the level of postnatal diseases reaches, in some cases, 85-90 %. The different natural and artificial substances are used to improve the calving and lactation capacity. The artificially synthesized substances (hormones and antibiotics) contain the limited number of compounds and thus couldn't provide with full effect on the reproduction performance (Zheng, 2012). The endocrine function of placenta, during pregnancy, is one of the most important events that influence both the future of the calving and the next lactation (Cotor, 2011). The other hand the tissue preparations may cause allergic reactionsand infections. Also their biological activity dependents on the tissue origin and tissue preparation procedure. The aim of this study was to evaluate the efficiency of bovine placenta extract application for correction of reproduction performance of the first-calf cows.