[Fibronectin levels in threatened abortion].

Studied were 25 healthy gravidae in the first or second trimester of pregnancy and 28 women with threatened abortion (TA). Plasma fibronectin (pFN) was assayed in maternal blood serum and the fetal fibronectin (fFN) was quantified in cervico-vaginal secretion. Patients with imminent abortion had significantly elevated levels of both pFN and fFN as compared with women with uncomplicated pregnancy. Within the TA group of patients, vaginal bleeding and/or trophoblast was associated with significant increase in fibronectin levels.