This study was conducted to evaluate the testicular biopsies and the sera l
evels of follicle-stimulating hormone (FSH), luteinizing hormone (LH), estr
adiol (E2), testosterone (T), and prolactin (PRL) in 96 azoospermic men att
ending the Andrology Clinic. Plasma levels of FSH were the most common horm
one abnormality in the evaluation of azoospermia. Plasma levels of LH and T
were useful only in azoospermic men with hypogonadism, whereas plasma PRL
levels rarely occurred in azoospermia.