Endocrine evaluation of infertile men.

OBJECTIVES: To determine the incidence and type of endocrinologic abnormalities in men undergoing infertility evaluations and the most appropriate testing to detect them. METHODS: A retrospective review of consecutive patients attending two infertility centers was performed. Results of endocrine testing were compared to medical history and physical and laboratory findings to determine whether endocrinologic screening could be limited to a specific subpopulation. RESULTS: Only 99 of the 1035 patients (9.6%) had abnormal endocrine studies upon repetitive testing. The majority of these patients had an isolated elevation of serum follicle stimulating hormone (FSH) levels. Only 1.7% had a clinically significant endocrinopathy that would have had an effect upon disease management. Screening with serum testosterone and FSH levels alone was just as effective as a complete hormonal panel of testosterone, FSH, luteinizing hormone, and prolactin for the detection of clinically significant endocrinopathy. Only 1 patient with a clinically significant endocrinopathy would not have been identified if hormonal screening was limited to only those patients with a sperm density of less than 10 x 10(6)/mL. CONCLUSIONS: Endocrinopathies are a rare cause of male infertility. Endocrine screening of men with sperm counts of less than 10 million/mL with serum testosterone and FSH levels alone will detect the vast majority of clinically significant endocrinopathies.