measured fetal fibronectin by immunoassay with the monoclonal antibody FDC-6. They observed an associa- tion 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.
Methods