IN-VITRO PRODUCTION OF BOVINE EMBRYOS - L IMITS AND FUTURE RESEARCHES

Recent progress in gamete biology and early embryo development was res ponsible for great evolution of reproduction techniques in farm animal s. Among these techniques, in vitro production of bovine embryos was d eveloped from slaughterhouse ovaries. This method has been used for in dividual animals. However, large variations in results were observed, due to several factors, including reproductive state and age of the do nor. Inspite of this limitation, in vitro production of bovine embryos may be helpful, when slaughtering of valuable cows is recommended, e. g. for brucellosis disease. Researches are purchased in order to incre ase the number of oocytes obtained per <<elite>> cow and to improve th e ability of in vitro embryos to support freezing.