Incidence of nonbacterial intraamniotic infections in abnormal pregnancies.

Amniotic fluids from 41 abnormal and 47 control pregnancies were examined for viruses, Chlamydia trachomatis, Ureaplasma urealyticum and Mycoplasma hominis. Abnormal pregnancies included those with fetal abnormalities, maternal complications, suspected chorioamnionitis and premature labor. Two percent of cultures were positive, including cytomegalovirus from one case of fetal growth retardation and U urealyticum from two patients with chorioamnionitis and from two controls. The abnormal pregnancies studied generally were not associated with nonbacterial intraamniotic infections.