Gonadotropins (FSH and LH) and testosterone in human male serum and seminal plasma

Concentrations of gonadotropins (FSH and LH) and testosterone (T) were measured in male serum and the seminal plasma of normo-, oligo- and azoospermic ejaculates. In addition, T levels were measured in tissue extracts of testis and prostate. The concentrations of FSH were nearly the same in seminal plasma and serum. However LH levels were higher in seminal plasma, while T levels were higher in serum. In azoospermic samples, the gonadotropins showed increased concentrations, while T levels were decreased. The concentrations of all three hormones differed in the seminal plasma of infertile men compared to the control group.