Etiology of azoospermia in a large nonreferral inner-city population.

A higher proportion of nonobstructive than obstructive azoospermia, as well as an increased prevalence of hypogonadotropic hypogonadism were documented in a retrospective study characterizing azoospermia in a population of predominantly Latino, inner-city male partners of infertile couples, as compared to previous reports from relatively affluent socioeconomic status male populations.