Comparison of the incidence of Ureaplasma urealyticum in infertile men and in donors of semen.

569 infertile patients and 75 fertile men (donors of semen) were included in our study from 1985 to 1987. We compared the frequency of Ureaplasma urealyticum in semen specimens in these two groups: 40 infertile men (7%) and 4 donors of semen (5.3%) had U.