ABSTRACT
30 infertile patients were included in this study according to certain criteria, which are harboring Mycoplasma or Ureaplasma and being free from any other systemic or local factor that might influence semen. Another 30 patients whose semen samples were free from these organisms were included as control. Complete semen analysis, cytology and culture were done and data obtained were analyzed statistically. The study showed that Ureaplasma urealyticum has a significant effect on the following semen parameters: pH and liquefaction [increased], sperm motility [depressed], sperm concentration and viability [decreased] with increased percentage of abnormal forms. On the other hand, mycoplasma showed a significant effect only on the increased production of abnormal forms. These results point to the necessity for culture of these organisms, especially in the long standing idiopathic asthenozoosperm and/or increased percentage of abnormal forms in any barren marriage