Said Mohammadzadeh - Physiologist (phD) Lorestan University

Time is not able to impede the progress of science. This progress enhances in so far as modern technology exists. Cloning is a subject in biological sciences, which nowadays its advancement it accelerated like other issues in this branch of science. Cloning as the process of preparation of an identical copy for an organism, could be either used in many filed of science such as medical research or unfortunately for political purposes. This paper deals with a cincise appraisal on evolution methods of cloning up to the Vilmut method. The advancements achieved for this method through the works of many scientists across the globe are also discussed. The vilmut method of cloning must be applied merely for clinical porposes owing to very low (1-2%)chance of success and high rate of embryo mortality . application of cloning for political aim is not correct and it is ant ethical.