Endocrine disorders are widespread in men with infertility. Objective: to assess the prognostic significance of follicle stimulating hormone (FSH) in terms of spermatogenesis in infertile men. Materials and methods. Surveyed 150 men with impaired semen analysis. All patients were measured FSH level, the volume of the testicle. Results. Normal indicators of FSH (12-15) IU/ml were in 96(64%). The level of FSH, sperm motility and testicular volume show an inverse relationship (p<0,05). Summary. Endocrine disorders occur in 36% of men with infertility.