Abstract

Plasma follicle stimulating hormone, luteinizing hormone, testosterone, urinary 5-hydroxyindole acetic acid and 17-ketosteroids were measured in patients seen at an infertility clinic. Plasma follicle stimulating hormone and luteinizing hormone levels, and urinary 5-hydroxyindole acetic acid levels were increased in patients with sperm concentrations less than 10 times 106 per ml. Plasma testosterone levels were lower in patients with sperm concentrations less than 10 times 106 per ml. The results suggest that in patients with sperm counts less than 10 times 106 per ml. there is not only impaired spermatogenesis but also decreased Leydig cell function. Urinary 17-ketosteroid levels were not related to sperm cell concentration.

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