Measurement of inhibin.

The bioassays developed so far, although good for detecting inhibin from different sources and for monitoring their purification, are not really practical for physiological studies. Moreover, they are influenced by steroidal hormones. In this regard radioimmunoassays, with their high capacity and greater sensitivity, are of immense value in studies involving the physiology of inhibin. More information on this aspect will probably lead to the development of more rational methods of assay. However, the need for an international reference preparation that will provide a common basis for comparing data from different laboratories cannot but be emphasized.