Relationships between serum FSH level and the size of testis in azoospermic patients.

Sixty-eight out of 700 patients proved to be azoospermic at our Andrology Clinic between 1981 and 1983. According to the serum FSH level and testis size, three main diagnostic groups were established: 1. patients with occlusion but testis size and FSH level normal; 2. patients with smaller testis size and increased FSH level and primary spermatogenetic disorder; 3. non-palpable testis and increased serum FSH level referring also to testicular disorder. No correlations were found between serum LH and testosterone levels and testicular volume.