measured fetal fibronectin by immunoassay with the
monoclonal antibody FDC-6. They observed an association
of preterm birth and fetal fibronectin in 117
women with possible preterm labor, half of whom were
delivered before 37 weeks’ gestation. We sought to
investigate the utility of cervicovaginal fetal fibronectin
as an improved method to detect preterm labor in a
prospective, multicenter trial.