Methods for controlling the application of anabolics in farm animals

In the use of anabolic agents, the most pronounced effect on growth is caused by estrogens. For this reason primarily attention will be given to the methods of detection of estrogen administration to fattening animals. The detection methods can mainly be divided in histological, biological, chemical, and immunological determinations and these will be briefly discussed in the light of the present situation in many countries, where the use of anabolic agents is prohibited. From the point of view of control, this prohibition is much easier to handle than a situation in which the application of some specified products is permitted. The possibilities and limitations of control, when certain anabolic agents are permitted for use, will be discussed and evaluated. The conclusion is drawn that in this latter case a sufficient control is very difficult if at all possible considering the methods of control available at the time.