For the past two or three years the medical literature has been filled with numerous reports as to the effect of endocrine therapy on cryptorchidism. In the main the accounts of successes have been glowing indeed. The published data have been pounced on by all the drug firms which distribute endocrine products, and the desk of every physician in the land has been deluged with reprints and advertisements. The idea of endocrine therapy for undescended testis has been "sold" to the medical profession. Every one has heard all about the results of this method of treatment and is familiar with the happy outcome. Therefore I shall not take time to quote the many statistics which have been presented. In general it will suffice to say that in the compiling of a group of published results 179 cases were found of successful treatment and seventy-four of unsuccessful treatment, or 62 per