[Clinical, hormonal and spermiologic evaluation in 25 crytorchids patients (author's transl)].

To obtain as many informations as possible about the degree of their fertility, 25 patients treated with gonadotropin or surgically for unilateral or bilateral cryptorchidism, were submitted to clinical examination, to evaluation of the endocrine testicular function, and to detailed sperm analysis. With respect to the serum gonadotropin levels, it is possible to distinguish three groups of patients : some with normal FSH and LH, some with increased FSH and normal LH, and some with increased FSH and LH. It appears that the tubular cells exerce a feed-back control on the FSH level, probably through a substance called "inhibin". The possibility is suggested that some feed-back control on the LH level is equally exerced from the tubular cells.