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The aim of our study was to investigate the cervical immunoglobulin A concentration in women with threatened preterm delivery. Immunoglobulin A concentration in the cervical mucus of 80 women with symptoms of preterm delivery was measured using radial immunodiffusion. The results were compared with those of 60 healthy pregnant women. Concentrations of immunoglobulins in maternal serum were also measured. There was no significant difference of cervical immunoglobulin A (IgA) concentration between women with threatened preterm delivery and controls: 53.98 (0.0-189.7) mg/l vs. 61.7 (1.4-400.9; p&lt;0.4) mg/l (median, range). The median of cervical IgA levels in the group of threatened preterm delivery did not differ significantly between patients delivered preterm (n=34) or at term (n=46): 38.3 (0.0-187.9) vs. 65.7 (1.4-189.7; p&lt;0.2) mg/l. Women with a normal vaginal flora showed a significantly higher cervical IgA concentration than those with a pathological colonization: 72.7 (0.0-187.9) vs. 42.5 (0.0-189.7) mg/l. Patients with a pathological vaginal smear and preterm delivery had the lowest IgA levels (35.0; 0.0-187.9 mg/l). Measurement of cervical IgA concentration does not differentiate between women who deliver before or at term.

Cervical immunoglobulin A and altered vaginal flora in pregnant women with threatened preter delivery