[Levels of fetal and plasma fibronectin in patients with cervical incompetence].

In 45 gravidae (below 24 weeks) fetal fibronectin (fF) was measured in cervico-vaginal discharge and plasma fibronectin (pF) was evaluated in venous blood. Twenty women had cervical incompetence (CI) diagnosed and 25 healthy gravidae served as a control. The fF level in patients with CI (0.073 +/- 0.014 mg/ml) was significantly (p < 0.01) higher than that found in the control group (0.058 +/- 0.011 mg/ml). The same was true for pF (p < 0.001). A diagnostic value of fibronectin levels in patients suspected of cervical incompetence is suggested.