Shortening of the cervix and the presence of fetal fibronectin has been shown to be predictive of preterm birth. These indicators where seen as risk indicator but can actually be seen as first ...

A positive cervical or vaginal fetal fibronectin test at 22–24 weeks predicted more than half of the spontaneous preterm births at <28 weeks (sensitivity: 0.63). [42] The relative risk for a ...