Abstract
The hormones available, their functions, and indications for their use are briefly considered. Clinical and exptl. reports of their use in reproductive disorders are summarized. For any type of failure the percentage response is much the same regardless of the therapy used, and spontaneous recovery is high in some conditions. It has yet to be proved that any hormone therapy is beneficial in group treatment of any type of breeding failure. Better controlled expts. and closer collaboration between clinicians and endocrinologists are needed.